Okay! I'm done! I'll get you some picks later i promise. With my method, you don't need any glue or hardware skills and if you get a lite, all you need to do is unwrap the sticky tape and glue the cover back on! that simple!
firstly you need 4 things
1. the expansion pack (der!)
2. An unwanted GBA game
3. triwing screw driver and a small screw driver (i used a stanly knife)
4. really thin sticky tape (i used masking tape.
5. A file
step one
turn the expansion pack around to the back. Notice the small screw? unscrew that and open it up. you'll be presented with a PCB and a little motor on the top. The motor is attached to adhesive which needs to be peeled off. Make sure that you do not detach the wire.
Step two
on the back of the GBA cartridge, theres a triwing screw. unscrew that. If you really hated the game or you got it cheap, dispose of the back of the cartridge and the PCB.
Step Three
Get the front of the GBA case. File down the part that is sticking up, you'll kno what i'm taking about when you try to stick the 2 parts together. Now get the front of the GBA case the the now opened expansion pack and put them both together. the bottom of the expansion pack and the gba case should line up perfectly.
Step Four
grab your tape and apply the tightest and thinnest layer around the bottom. Don't put it in just yet! notice the groves on the sides of the GBA case? well you need to cut the tape so that the tape goes into the grove, allowing the gba cardrigde to slide in.
Step Five
Yeah, its a tight squeeze but don't worry, so's mine. Just cover holes with some tape and your done
FINISHED!
hope that helps!