Since PS3 has a feature to transfer save from a PSP you could use that.
If you want I can convert that card from .mcr to the format PSP uses.
After that you can simply plug PSP to PS3, browse for a save and transfer it to PS3. Instructions can be found
here.
Btw: Are you planning to play Chrono Cross on the PS3 too or just on the PSP?
If you are planning to play it on the PSP only then you could just use a built-in PSX emulator to play the game, if you have a custom firmware off course.
__________________
C2D E8400 3.00 Ghz | EP45-DS3 | HD4850 512MB | 4GB DDR2 800 | 640 + 250 GB HDD
SyncMaster 2233BW 22" | Logitech G5 | Logitech G15 | Windows 7 x64