Still no luck...
- got RGSC from here
(since is required to run 18.104.22.168)
- scripthook (0.5.1, by alexander blade & aru) + asi loader (dsound.dll) from here
(translation: supported gta patches 22.214.171.124, 126.96.36.199, 188.8.131.52, 184.108.40.206, 220.127.116.11, 18.104.22.168, 22.214.171.124)
- .net scripthook from here
(v126.96.36.199a, for gta 188.8.131.52 and older)
...and game starts.
BUT whenever i put icenhancer 2.1 or 1.25, it's the same as before. Processes just hang there and the game doesn't start.