So if some of you need the ID of the aliens in this mod , I have made a little list
-ADVENT Sentry:
basic: advsentryM1
guardian: advsentryM2
sentinel: advsentryM3

-ADVENT Gunner:
basic: advgunnerM1
heavy: advgunnerM2
elite: advgunnerM3

-ADVENT Grenadier:
engineer: advgrenadierM1
grenadier: advgrenadierM2
heavy grenadier: advgrenadierM3

-ADVENT Rocketeer:
basic: advrocketeerM1
heavy: advrocketeerM2
elite: advrocketeerM3

-ADVENT Drone:
Surveilance: LWdroneM1
Hunter: LWdroneM2

-ADVENT MEC Archer:
archer: advmecarcherM1
longbow: advmecarcherM2

-ADVENT Super heavy MEC:
basic: advmec_M3_LW

-Sectoid:
sectoid commander: sectoidM2_LW

-Viper:
serpens: viperM2_LW
elite: viperM3_LW

-Sidewinder:
basic: sidewinderM1
serpens: sidewinderM2
elite: sidewinderM3

-Naja:
basic: najaM1
serpens: najaM2
elite: najaM3

-Muton:
centurion: mutonM2_LW
elite: mutonM3_LW

-Archon:
great archon: archonM2_LW

-Chryssalid soldier:
basic: chryssalidsoldier

-Hive queen:
basic: hivequeen

Enjoy