Ok, One last shot at this with this new 2.6 Exploit, from what i have heard it launches the PSP gameboot thing, but i have not seen a video yet...
Get
The Exploit Here and
download 1.5
Put the exploit on the first stick, then the 1.5 eboot on the second. Start the exploit, right when the light stops blinking, shut off the PSP and insert MS2 with the 1.5 eboot on it. Turn on PSP, and since i dont know much about this downgrader, i am not sure if it will work