please somebody help ASAP.
If you post your phone model and Android version, it may be easier for someone to answer your question.
After I posted the above, I noticed the T-Mobile G2X forum on your post. If that is your phone, here is a link to a video on unrooting the the G2X.
Hope this helps.
XDA Developers also has a stock version that you can root to to essentially "unroot".
Separate names with a comma.