Newbie Question Please help

[rottirudy]

I have been reading readin reading and there is a ton of in on this site and it is very inforomative, I was wondering because I have not found the answer to this question. So hear goes, actually a coulpe of questions..
1. Will flashing teh rom void the warrenty
2. Is there a program out there that will let me make a complete back up of my rom incase it has to go away for service at any time?
3. Does the custumeized roms run wm 6.1?
4. Does it matter who I donate too?

Thanks to anyone that can answer these questions for me I know they are probally stupid questions but still I needed to ask since I could not find answers to them have been reading and reading with no luck to someof these.. Once again and thanks to one and all that helps.. This is the best site I have found about these products.. Thanks once again...