Virtua Tennis auto upgrade

I have just downgraded my psp to 1.50, got emulators working great, but my original copy of virtua Tennis wants me to upgrade before i can play it. I remember reading somewhere that there is a program called PSPset? Can anyone let me know if that is the program i need, also in which directory on the psp i place it?

Thanks

You need the WAB version changer.

... or the UMD emulator. You can run your UMD games w/o having to update with either program.

or devhook v0.22 it can run Virtua Tennis without umd
and it stops those annoying pauses after every point is scored