Elyterix

I don't know if you are against it, but AI is quite capable of helping you out. The wiki is very detailed and it will use it as a source. "Also, I downloaded some scripts to see the process and read the code, but suddenly it's encrypted :(." Did you attempt to view .luac files? Those are compiled and obfuscated. Did you download them from a server you had joined previously, or from another source (like the MTA resources repository?) You can look for non-obfuscated scripts elsewhere.

PRO Race's old maps are pretty good indeed. But do you even have the server up yet?