Hey guys, I have just gotten my iphone here in the UK, from America, it's upgraded to 1.1.2, jailbroken and unlocked.

I want to go about modding the phone, what would you guys suggest for backing up etc in case i mess things up, if i have to do a restore will i have to jailbreak the phone again and unlock it and everything?

Also, if anyone can suggest what tools to use and things you recommend I do to the phone before anything else, I didn't do any of the previous modding myself so i don't know what version the phone was originally at or whats been added/changed on it.
Thanks