Er, that's a longer answer, and your phrasing makes me concerned that I may have glossed over important details... so the long version:The tor browser is just a modified, specially configured version of Firefox. The tor browser does NOTHING to protect your anonymity, EXCEPT that it's configured specifically to work 100% anonymously through Tor. Tor is the program that actually makes your activity (more or less) impossible to decipher. The browser only makes sure it doesn't do stuff that fucks up what Tor is trying to do in the first place (for example, some programs even though you've configured them to go through the Tor proxy on your computer, will still make a DNS query to find the IP address of the sites you visit -- which means Tor can't protect you when it's going AROUND Tor and announcing your destinations on its own w/o telling you).Vidalia is the graphical component that you interact with. It isn't Tor either, but it provides a GUI to control your Tor program through.And no, you aren't safe torrenting with peerblock. Safer, maybe... but not safe. They can still log you & sue you.