FedEx dropped off my 770 this afternoon. I've been able to connect to my network and do some surfing. Even though web browsing is why I bought it, I'd like to play around and install some different things on it to try and learn something.

My first question: Is there a way to do a back up of it so that if I screw up installing something, I can at least get back to where it is today?

Question number 2- I'm not clear what role the MMC card plays. Obviously the OS doesn't reside on it (though I understand that it can). Is it simply where songs/pictures/videos are stored. Does it also serve as RAM?

Question number 3- Is there a better browser then the one installed? I'm able to get into some web sites fine, others I click on and nothing happens.

Thanks in advance.

Matt