You won't with that rom. He took out the app that calls for the update. You couldn't download anyway as it requires a stock recovery.
Samsung Epic EB13 Deodexed with Genocide Kernel
Samsung Moment DL05 Froyo Port Rooted with MRWRX Kernel 2.0.1 Recovery 3.1.1 and UD4.1
Samsung Intercept (Sprintercept) 2.2
For all your rooting needs. http://www.sdx-developers.com/