ok iGot the usb drivers for android but after the RUU.exe finishes running my phone continues to boot the custome rom instead of stock Sprint rom
That makes absolutely no sense.
Please provide details on the exact process you're using so we can help you sort this out. Here's a quick run down -
Make sure phone is charged.
Shut off screensaver on your Windows PC
Plug in the phone (to the PC)
Start the HTC sync software, then exit it.
Double click the RUU program, and follow the directions it prompts to you.
Don't open other windows or allow the screen to blank on your PC while updating.