PSP is now able to play all primary PS software

You can play games for primary PS downloaded with PS3 with PSP "Remote playAlthough there is a thing called PS 3 system update, it seems that all the software including not only the downloaded software but also the software for the original PS on hand can be remotely played with PSP.

Details are as below.
** The Unofficial PS 3 / PSP Remote Play Thread ** [UPDATED 12 - 18 - 07] - PLAYSTATION R Network - PlayStation.com Forums

According to this article, on the 18th system update of PS3, the software for primary PS downloaded so far "Game archives"It was only possible to play by remote playing with PSP on PS3 even by loading the disk of the original PS software.

This means that titles that were not sold at Game Archives can be played if you have even a disc.

It might be a good idea to pull out the software for the first PS sleeping in the bottom of the room and play.