Justin,
Hi. I wanted to tell you that I was having the same problem backing up my original Knockout Kings 2002 game. When I booted the Memorex dvd-rw (created w\ Primo or Recordnow) using an iso image (created w\ XiSO, XDK, or Isomaker), it would just boot to the EvoX menu screen. Also, I had tried patching the default.xbe using XiSO. However, that did not work either. I retraced my steps and searched some more. I realized there was a download that I had not tried and had overlooked. I d\l'd the xboxcrk.exe file. This file was never specifically mentioned in the walkthrough that I read. However, after running it on the xbe file, I created and burned the backup ISO on a Memorex dvd-rw and removed the EvoX dashboard. My backup now boots & plays flawlessly. I will try this with the other games that I have bought so far. Hope this helps. Later.