Improves responsiveness of the unit (rooting process). Basically it's all to get Titanium backup installed so you can freeze unnecessary processes. As a side note that I'd like to add, I know Soren said in the guide he freezes the stock launcher and warns that you should have another launcher installed before doing this. This is the one thing I advise people not to do. Reason being I've been playing with android devices for a couple years now flashing roms regularly to different devices....you should always keep the stock launcher as a fail safe just in case something happens to the new launcher you're running (corruption or some kind of bug that you can't recover from). You can always just choose the new launcher as the default and lose nothing in performance as it already knows to use your new launcher as the default startup method. Just wanted to throw that in there since I've had systems not boot due to launcher issues and not having a "backup" launcher.
I'm a bit of an android noob, while I managed to root and freezes the apps ok, I was wondering if there is an easy way to auto launch the music app on boot?