How do you convert PSP games to PC games

It's not exactly legal to do so. If that was an option, we all could buy an PSP game and play it on all platforms. But usually the companies want to create a game for each platform, and the customer kinda has to buy the game for each platform he wishes to play on.

The hard cold news is that you will have to buy the game for the PC if it exists for PC.

We cannot inform or instruct you on how to do an illegal action.