select a picture press your menu key, and select move, press the folder up option until you're under the "media card" directory, then you may have to create a new folder, but then press menu and move here, depending on how many pictures you have it's not gonna be fun.
The quicker way would be to use mass storage mode. Just open up the picture folder on both drives and drag the pictures from the device drive folder to the media card folder.
Posted from my CrackBerry at wapforums.crackberry.com
menu --> options --> memory --> set "Auto Enable Mass Storage Mode When Connected" to Yes
For me, I have to run desktop manager, then connect the phone to the PC, and it will show up in windows explorer, as "Blackberry1" and "Blackberry2". If I'm not mistaken, Blackberry 1 is device memory, Blackberry 2 is the SD card.