how to get rid of custom recovery image?

[Guest Catscrash]

Hi,

i need to send my tattoo back to htc, unrooting is explained here: http://theunlockr.com/2010/03/30/how-to-un...the-htc-tattoo/

but in order to flash mcr, i installed the custom recovery image, how do i get that back to normal?

thanks