Customized UBCD won't boot

[hoyadds]

I tried to customized UBCD by adding PTEDIT to the UBCD iso image, but it won't boot. If I burn the basic downloaded UBCD to a CD, it boots just fine. I tried to follow the instructions in the "Customizing UBCD" guide, but found it (to me) to be cryptic, and am not sure what I am doing. Could somebody please give me clearer instructions as to how to add PTEDIT to UBCD, and have it boot? Thanks.