Transfering save data in PSX game from disc 1 to disc 2.

Hi.

I've been playing the PSOne game Xenogears on my PSP with POPStation. I just recently got to the end of disc 1, and the game now asks me to load disc 2. When I open the disc 2 file however, the memory card data from the first disc isn't there. Does anyone know how to transfer my save data over to disc 2?

Thanks in advance for the help!

-Tyler