I dont think it would work, but have you tried the touch n swap method, Im just curious? They said you couldnt use a pandora slim battery to mod a phat, but you can with the touch n swap method, as I have done it. I dont have the newer ta88 to experiment with but you could just try it to see maybe. Worth a try maybe, cant really mess anything up.
is this the video on youtube?
YouTube - PSP Firmware-Hack 4.01 M33-2