@ERIS, Thank you! I'm glad you like it. I'll have to look into the 'Ravenholm Ambience' suggestion when I have time, since I could totally do it. If it sounds more fitting than "Probably Not A Problem", then I will (though it's more difficult to choose between ambient tracks as there are a lot of them in the HL2 OST).
If you or anyone else has any other suggestions, I'm more than happy to hear them out.

really sweet work by you(and by the track composers as well). do you think that you can replace the secret room ost with 'ravenholm ambience'? any other creepy/deserted looking room/floor will do as well.

Thanks!