That seems like a bit of work, and for that matter, it would also cost money. Maybe I should just start some actual programming instead of all this. There are just too few options with these cheating elf's.
CC will only accept SYSTEM.CNF from CDVD.
I think you need to swap the disc whilst in CC as it may recheck the disc.
The way I did it was boot my ps2 up from cold with an original disc inserted, loaded the CC elf off FMCB's osdmenu, then swapped the disc with a uLE disc without opening the tray whilst in CC, it then booted uLE, from there I could load whatever backup loader elf I wanted.
PS2: Slim v12 Ps2 with external fan
FMCB 1.8b using ESR r9b
Ulaunch 4.41, GSM, Codebreaker10
PS3: 8o gb hdd non Backwards Compatible with Kmeaw's 3.55 cfw
Xbox: 20 gb hdd, soft-modded
Gamecube: external fan
N64: Non-modded(planning on a fan)