Rooted Android Help?

Hey all! How are you all? I've been busy and will be again, but I really need help with my phone: The HTC Droid Incredible

I rooted my phone yesterday, and downloaded ROM Manager. Was playing around with it, downloaded some kind of theme, and it required a reboot. I did it, and during the last part of the reboot, it went back to the beginning stage: HTC Logo. It keeps doing that in a loop, and I can't stop it unless I take the battery out. I can't access my sd card (it doesn't read it on my computer since my phone shuts down like every 10 seconds), which is also another problem. If I can maybe get into the sd card I might be able to find the theme and delete it, but for now, I'm helpless. I tried basically everything, except for taking it to the verizon store. But if I take it, and they find out it's rooted, then I can't get a new replacement since my warranty is gone with the rooted phone. I really don't have a clue what to do, so please help me. I need my phone! I have a lot of stuff on there that is important...

here's what you do, replace the battery for C4

LOL jk dont idk what to do

chances are you put a virus on it =\, try using a a card reader for cameras? you just have to find one that can accept mini sd's or w/e sd card your phone uses

^ try that, might work.
i have htc inspire 4g, almost tried rooting it but seems wayyyy to difficult than jailbreaking iphone/ipods.

Okay, I went to verizon and they said that the original program that booted the phone was taken over by an app called 'ROM Manager'. The only way to fix my phone is to unroot the phone and uninstall rom manager completely. I would be able to do this easily, but when I connect my phone it doesnt show up in 'My Computer'. The computer does recognize the usb though...can anyone help?