If some of you are still going to gripe about the CS:S requirement, here's a solution for you. I don't have the time to be reworking all this for the sake of random people I don't know, but if one of you who reads this has CS:S, I can provide here the content list of all models and textures used in the map, from the itinerary I compiled before initially packing the map when it was still new. If anyone can locate all these assets and make their own content addon for this map that can help surpass the CS:S requirement, I will endorse your content addon by linking it on this page. Is anyone willing and able enough to do this? We'll see. I'm handing you guys an opportunity to make a revolutionary improvement to the map.

Note: Textures will be listed by their .vtf files.

agency/carpet/carpet_black01
agency/carpet/carpet_black01_n
agency/carpet/carpet_brown02
bridge/se1_metal_flat_steel_01
concrete/ceiling03
concrete/cinderwall04
concrete/cindmad02-ssbump
concrete/concretewall002a
cs_havana/bookcase_small
cs_havana/door03
cs_havana/door03_normal
cs_havana/furniturewooddrawers001b
cs_havana/furniturewooddresser001b
cs_havana/ground01_blendtool
cs_havana/metal02
cs_havana/woodf01
cs_havana/woodm
cs_italy/wallpap04b
cs_italy/wallpaper02a
cs_italy/wallpaper02a_normal
de_aztec/ground01dirt
de_aztec/ground01dirt_normal
de_aztec/ground01grass
de_aztec/ground01grass_normal
de_aztec/wood_plank_7
de_cbble/door011
de_cbble/door011_normal
de_cbble/grounddirt
de_cbble/grounddirt_normal
de_dust/door011
de_piranesi/{pi_tapestry1
de_piranesi/pi_wood3
de_piranesi/woodfloor02
de_piranesi/woodfloor02_spec
de_piranesi/woodstair02
de_piranesi/woodstair02_spec
de_prodigy/metal02
de_train/train_metalceiling01
detail/dt_metal2
detail/dt_smooth1
detail/dt_wood1
effects/offelevdrsa
effects/offelevdrsa_ref
glass/glasswindow_frosted_003
glass/glasswindow_frosted_003_dx8
glass/offlightcover
glass/offlightcover_off
glass/offlightcover_ref
glass/unbreakable
glass//unbreakable_ref
labs/se1_metal_diamond_floor_02
metal/freezerdoor01
metal/metaldoor061a
metal/offelevdrsa
metal/offelevdrsa_ref
metrostroi/subway_tile03_dirty
plaster/prodwlla
realworldtextures/floor/wood_floor_2
realworldtextures/newer/1/wood_1_01
realworldtextures2/detail/dt_smooth1
realworldtextures2/wall/wallpaper_53
realworldtextures2/wall/wallpaper_53_nrm
realworldtextures2/wall/wallpaper_60
splayn/rp/lr/sofa_tex
stone/infwllj
uusi/woodwall2a
uusi/woodwall2a_bumb
wood/boardwalks01
wood/milflr004
wood/woodfloor01a_normal_lfw
wood/woodfloor01c_lfw
wood/woodfloor002
wood/woodsiding_ext_07

pg_props/pg_hospital/pg_roll_table
props/cs_assault/Floodlight01
props/cs_assault/light_shop2
props/cs_assault/streetlight
props/cs_assault/washer_box2
props/cs_havana/bookcase_small
props/cs_italy/it_mkt_table2
props/cs_militia/boxes_frontroom
props/cs_militia/boxes_garage_lower
props/cs_militia/couch
props/cs_militia/fireplacechimney01
props/cs_militia/paperbox_pile_01
props/cs_militia/television_console01
props/cs_militia/tv_console
props/cs_militia/wood_table
props/cs_office/bookshelf1
props/cs_office/bookshelf2
props/cs_office/bookshelf3
props/cs_office/cardboard_box01
props/cs_office/cardboard_box02
props/cs_office/chair_office
props/cs_office/coffee_mug
props/cs_office/coffee_mug_p1 ~ p3
props/cs_office/coffee_mug_2
props/cs_office/coffee_mug_3
props/cs_office/compter_monitor
props/cs_office/computer_monitor_p1 ~ p2a
props/cs_office/doorknob
props/cs_office/file_box
props/cs_office/file_box_gib1 ~ 2
props/cs_office/file_box_p1 ~ p2d
props/cs_office/file_cabinet1_group
props/cs_office/file_cabinet2
props/cs_office/file_cabinet3
props/cs_office/offcorkboarda
props/cs_office/offpaintingg
props/cs_office/offpaintingi
props/cs_office/offpaintingj
props/cs_office/offpaintingk
props/cs_office/offpaintingl
props/cs_office/offpaintingo
props/cs_office/paperbox_pile_01
props/cs_office/phone
props/cs_office/phone_p1 ~ 2
props/cs_office/Snowman_hat
props/cs_office/sofa_chair
props/cs_office/trash_can
props/cs_office/trash_can_p ~ p8
props/de_chateau/light_chandelier02
props/de_inferno/cart_wheel
props/de_inferno/ceiling_light
props/de_inferno/ChairAntique
props/de_inferno/ChairAntique_Damage_01 ~ 04
props/de_inferno/ClayPot01
props/de_inferno/ClayPot01_Damage_01 ~ 04
props/de_inferno/ClayPot02
props/de_inferno/ClayPot02_Damage_01 ~ 04
props/de_inferno/ClayPot03
props/de_inferno/ClayPot03_Damage_01 ~ 06
props/de_inferno/clock01
props/de_inferno/fireplace
props/de_inferno/GoldFish
props/de_inferno/potted_plant1
props/de_inferno/potted_plant1_p1
props/de_inferno/potted_plant2
props/de_inferno/potted_plant2_p1
props/de_inferno/potted_plant3
props/de_inferno/potted_plant3_p1
props/de_inferno/TableAntique
props/de_inferno/tv_monitor01
props/de_inferno/wine_barrel
props/de_inferno/wine_barrel_p1 ~ 11
props/de_prodigy/desk_console1
props/de_prodigy/desk_console1a
props/de_prodigy/desk_console1b
props/de_prodigy/desk_console2
props/de_prodigy/desk_console_3
props/de_prodigy/lighthanging
props/de_prodigy/prodcables256
props/de_prodigy/tire1
props/de_prodigy/wall_console1
props/de_prodigy/wall_console2
props/de_prodigy/wall_console3
props/de_tides/patio_table2
props/de_tides/Vending_cart_wheell
props/de_tides/Vending_hat
props/de_tides/vending_tshirt
props/de_train/de_train_doorhandle_01
props/de_train/de_train_drainage_pipe
props/de_train/Floodlight
props_combine/combine_citadelcloud001c
props_combine/combine_citadelcloud003
props_combine/combine_citadelcloudcenter
props_downtown/booth_table
props_equipment/cooler
props_equipment/snack_machine
props_equipment/ticketmachine
props_foliage/ah_medium_pine
props_foliage/mall_bush02
props_gameplay/push_button
props_interiors/bed_motel
props_interiors/bottles_shelf
props_interiors/chair_office2
props_interiors/chair01
props_interiors/copymachine01
props_interiors/corkboardverticle01
props_interiors/desk_executive
props_interiors/desk_metal
props_interiors/desk_motel
props_interiors/dining_table_round
props_interiors/lamp_table02
props_interiors/magazine_rack
props_interiors/paper_tray
props_interiors/side_table_square
props_interiors/sofa_chair02
props_interiors/stove02
props_interiors/toilet_b
props_interiors/trashcankitchen01
props_jorpakko/pine_large
props_mvm/mvm_human_skull
props_mvm/mvm_museum_case
props_mvm/mvm_museum_rope001
props_mvm/office_window_vent
props_unique/spawn_apartment/coffeeammo
props_unique/spawn_apartment/lantern
props_unique/showercurtain01
splayn/rp/lr/couch

That is the complete itinerary of every single texture and model used for the map that was not custom-made by me. So, if you're wanting and able to make your own no-css-necessary content pack for others to take advantage of, there's your guide. Or else, you may be able to find something you are missing in your files. But, take note; due to how unreliable y'all are at confirming whether or not everything necessary is packed in the map, I can't confirm either that this is everything.

There may be a few things missing, I have no clue. But still, you've got something, and that's more than nothing. I just copy-pasted all that from a text document I made back when the map was new, I definitely don't have all the files anymore, which is why having CS:S is good.