Oh sorry, lot of people here that come to complain on how their pirated copy of Gta 4 doesn't work
Yes script files are usually in the misc section, like the ones you name. Once you have scripthook.dll and an asiloader (like xliveless or dsound) they are quite easy to install and remove. So you can always try if they work, and simply delete them if they don't. As for the other files like I said, they work for EFLC anyhow.. just make sure you open the right .img files
EFLC has a main pc/models/cdimages folder where you'll find all the basic Gta 4 weapons, and they also have that same folder inside /tbogt and /tlad for all the episodic weapons.