So I've rooted my phone but I want to install a custom ROM. I've read that I need (and I definitely want) to create a nandroid backup. The only problem is I have no idea how. I have ROM Manager installed. I read I need to Flash ClockworkMod Recovery so I did that. However, when I try to reboot into recovery either through Rom Manager or just holding volume down and power I get nothing. Does anyone have a clear and detailed guide on what to do? I'm not dead set on using Rom Manager I was just reading that it'd be easier.