Look... I thank you for your attention! I can assure you that I have tried several times to follow step by step every point of your suggestions but to no avail...
The only thing I can tell you is that I tried the installation process several times OR just with "dsound.dll" OR just with "xlive.dll".
GTA (so only the game simple - do not mean the mod) worked properly with the "xlive.dll" while I was creating problems with the "dsound.dll"...like I loaded a saved game and I started a new.
However, I thank you (again) for your attention and should you have other suggestions for me I would be grateful to you! :smile: