I just restored a rom i had on backup that i took just after installing the loader. If you don't have one then i'm not knowledgeable enough to help you further i'm afraid. If you've got a backup on your computer, you can use a usb card reader to put it on your SD card then boot into the recovery loader then do a nand restore.
All the best,
Ok thanks for help but thats not what i mean im back to stock now. Ok what i would like to do is install a recovery image this will then let me install updates.zip files so i could use the lates su and superuser update.zip from xde developers this is the latest version of su and superuser app when i update using the zip this stays even when i do a wipe so thats all good i would then like to get rid of the recovery image and restore the stock t-mobile recovery. And i will then have a fully stock system but it will be fully rooted with the latest su and superuser app.