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I am trying to install a custom rom vis rom manager. When to hit boot into recovery mode, and the phone reboots, the triangle with an ! in it comes up, also a phone symbol is there also. It is stuck. any solutions, or am I not doing it correctly?
thanks in advance.
Pull your battery and reboot normally. Then open ROM Manager and flash ClockworkMod Recovery. Then reboot to recovery.
Kratos
That did it, thanks. The instructions I am following say to do a Nandroid backup. Is that so if I install a rom and something happens, I can recover back to the rom I am backing up, which is stock?
thanks.

That did it, thanks. The instructions I am following say to do a Nandroid backup. Is that so if I install a rom and something happens, I can recover back to the rom I am backing up, which is stock?
thanks.
That is absolutely what nandroid backups are for. I suggest performing a nandroid backup right before you ever do anything (flash a ROM, flash a kernel, flash a theme, edit any files in the root section, etc).
As long as you have ClockworkMod Recovery flashed, you can make nandroid backups using ROM manager. There is an option to manage and create new backups.
To help show the importance of backups, I made a backup last night and then flashed a theme for UD 2.0.0. On reboot, my phone went into a bootloop and if I hadn't had the backup, I would have been SOL. I have three backups on my phone at all times. The first one I ever made (rooted stock), the fresh install of UD 2.0.0, and the backup i made just before flashing my theme.
Kratos