If I recall correctly, PSPBrew was able to convert gameboots that were compiled for 1.0 firmware into 1.5 kernel format, and vice versa.
I just got a new Slim and gave my Phat to the girlfriend (she was borrowing it all the time :) ).
So I'm just wondering if it's possible to recompile the 1.5 eboots to be Slim compatible, using a program to convert 1.5 kernel eboots into a higher kernel version?
Edit: Sorry, posted in wrong section. Can a mod move this to the homebrew hacks and help section?