You need:

• Nintendo DS / lite - NOT DSi
• Slot 1 flash cart
• Rudolph's GBA Backup tool: http://rs481.rapidshare.com/files/274901...ol_021.zip
  

Steps:

1. If your flash cart does not support auto-DLDI patching, patch the GBA backup tool manually
2. Copy GBA backup tool to flash cart
3. Execute GBA backup tool
4. Insert your GBA cartridge into Slot 2
5. Press A
6. Press R button twice to switch to ROM dump mode
7. Press B button to dump cartridge ROM to gba file
8. To dump another game: Press X button and start rom step 4
   

When you are finished, your dumped gba files are in the 'GBA_Backup' folder on your flash cart.

You can then play your GBA games on your PC using VisualBoyAdvance-M.

Using the same tool, you can also dump your save data from your original GBA cartridges. These can also be used with VBA-M. The tool even allows you to write back save files to your original cartridges.