Hello & Welcome To Softmod Depot
Now to answer your questions:
1. The xbox version does not matter when you are softmodding.
2. I would recommend using Krayzie's Auto-Installer that is in our download section under exploits. It is the easiest of all the exploits that we have. SC is a bit harder then the rest because you have to transfer over 2 saves instead of just one. 007 is a bit tricky to because you have to start a new game play till the cutscene is over then quit and load, otherwise you will get a black screen. I would recommend getting MA if you can.
i'm confused. i went to the download section, but under exploits, i didn't see anything with "auto-installer" in it. there *is* an smdautoinstallers folder, but the .nfo didn't look promising. do you just mean use one of krayzie's exploits (either uxe or ndure)?