This is a tut on how to put a gba emulator onto your jtagged xbox 360.

Step 1. you will need to gather the necessary materials which include
a usb flash drive formatted in fat32
a jtagged xbox 360 console
[ Register or Signin to view external links. ] that file which containd the emulator a few basic roms and all on the folder you need.
xex menu on your jtag
1 xbox 360 hard drive
winRAR
lets get started,
once you download the files and gather the necessary materials you will need to turn on your jtag and go into xex menu, once you are in xex menu press one time on the right bumper (rb) once you have done that press x and select hdd1 you should see a bunch of folders such as system update, cache, content, etc.
after you have done that press y and select creat name this games, you should now see a games folder.

now to the computer find the file you just downloaded and open it up using winRAR there should be 1 folder in there and in that 1 folder many others, what you do know is plug you usb into your computer and drag and drop the folder named xmuCR_XeBoyAdvance_0.4, make sure you put the folder on your usb not the RAR file

after you have done this go back to your jtag plug the usb in turn it on and go into xex menu, press once on the right bumper (rb) then press x and select either usb01 or usb00 (depending on which slot you put it in) then you should see the folder xmuCR_XeBoyAdvance_0.4 in there your going to need to scroll on top of it press y and select copy.

After you have copied the folder press x and select hdd1 after you have selected hdd1 click on the games folder, then press y and select paste the folder should now be in the games folder, to play either select the folder and click default.xex or it should show up in your games discovery as soon as you start xex menu.
PM me if you have any troubles or questions.