I find the data folder but local.prop isn't in there
Are you sure you're in the right data folder? Your SD card usually has a data folder. Make sure the path listed is "/data" and not "/mnt/sdcard/data" or something else.
Also for the supercharger I don't know how to extract it to the sd card. When I download it where does it go and how do I extract it?
This could be taken offensively, but please don't take it that way... I'm being honest and constructive: Downloading and working with compressed files are very basic computing skills (like Computer 101 level). If you're not familiar with them, working on a rooted phone is going to get you in over your head. I purposely wrote Step 1 without specific instructions on how to download and extract. If you can't get past it, you really shouldn't be going further... trust me, it only gets more risky from there.