you could always mod the pspbtcnf_game.txt so in stead of loading them off flash it loads the off memstick i.e. instead of $\kd\___280.prx it reads ms0:\kd\___280.prx and leave the 2.80 prx's in a folder called kd on the memstick then you can have any custom mod and to fix you just need to flash the original pspbtcnf_game.txt back in, which can be done in recovery mode and the flashing is kept to a minimal

P.S.
Anybody know why the devhook version changes 6 prx's
/kd/memlmd.prx to /kd/memlmd_280.prx
/kd/mscm to /kd/mscm_280.prx
/kd/mesg_led.prx to /kd/mesg_led_280.prx
/kd/registry.prx to /kd/registry_280.prx
/kd/utility.prx to /kd/utility_280.prx
/kd/impose.prx to /kd/impose_280.prx

and the SE-B only changes four ?
/kd/mscm to /kd/mscm_280.prx
/kd/mesg_led.prx to /kd/mesg_led_280.prx
/kd/registry.prx to /kd/registry_280.prx
/kd/utility.prx to /kd/utility_280.prx

I haven't tried yet but does any one know the reason for the difference ?

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