Make sure you only have 1 memory card inserted then use ule file browser to find the vmc you want to add the save to, press R1 and select mount VMC to whichever slot is empty. Then go into the memory card (still using ule file browser) and press L1 then  to show the names. Simply copy the file and go into the VMC (you should see in the root it says either VMC1 or VMC0) and paste it.
Softmodded V12 & V3 (750gb HDD) FMCB1.8
2x Softmodded xbox Ndure1.1 (40GB HDD)
PSP 3000 6.20 PRO-C
4.3 Softmodded Wii w/ DML