Ahh thats a shame, i would suggest hacking it if you can risk it,i only ever use my psp for the hacked programs and stuff. Some new batteries can't be turned pandora now so watch out for that.
I saw how they managed to play wow on their psp and from what i gather you could certainly play tak on the psp. They used the psp to take control of the computer wirelessly which means you would have to have the computer playing tak which kinda defeats the object but meh. check psp-hacks.com its a good site for tons of downloads and the newest stuff for psp