[nuguy]

take another look at this - I believe it is as close as you are going to get...
Realise that you can put your cabs (any programs) in the ext-rom so they fire off after a hard reset - just like you are asking for...

Originally Posted by CaptainJager

The only way I know how to do iy is following these instructions unless you cook your own rom in a kitchen. But this is the extrom way.
http://ppcgeeks.com/how-to-customize...rom-t1395.html