1:I'm almost positive that there is no GameCube emulator for the PSP.
2:You can ask about ripping games just not downloading them.
The easiest way to rip an ISO of a UMD is by going on the PSP main menu(XMB) pressing Select till a small menu pops up and changing the USB Mode to UMD Disk.Then plug in USB cable and enter UMD mode a just copy ISO over to PC..









