Thanks ssryy , the mod is almost complete it's my first real playable mod (even I'm using Hammer from one year). I wanted to recreate ambience/atmosphere of the movie. It wasn't easy task (many and many trial/error with lighting, textures ,sounds).
Obviously I changed some aspects a little to fit with HL world.
To Tosse: it wasn't easy recreate Samara with editor limitations !
specially since I didn't want edit existing HL models.
it's a HL 1 mod not Source.