Just got a xbox360 , I'm into looking in ways to mod my 360 so it can play trail Demo games, into full games. ?
I found this but seams unclear - http://digiex.net/guides-reviews/console-guides/xbox-360-guides/12895-xbox-360-jtag-rgh-hack-easy-update-dashboard-kernel-17150-xebuild-gui.html
"When you have Nand Flasher 360 downloaded, unzip it, then copy it to your USB drive"
But yet don't the USB drive have to be formated in xbox360 first ?.
Also got USBXTAFGUI_v44 and Horizon for injecting my files to the USB storage
I Downloaded Demo - http://digiex.net/downloads/download-center-2-0/xbox-360-content/arcade-game-trials/10812-dig-dug-arcade-game-download-bonus.html
Used Yaris-Swap 0.9 to edit trail to full , but corrupted on xbox360 once done , Until we can figure out the JTAG issue ?...

I did a compare in HEX - YarisSwap it first .
Top original file , bottom fixed file , Offset 0x00000006 to 0B is you're Console ID: in that case mine is 022059645362 - But only original Code works.

Offset 0X000000237 00 -> 01 might be Trail enable Disable to full . as 00 Trail on 01 Trail off , Just to (Note) They are no other changes in hex .

My Console ID at bottom .

But yet after edited and tested Still corrupted .
Thanks guy's .
PS: Anyone have a unlocked copy of dig dug unlocked by xbox live only ?, if so please upload it for me to check in hex matching ?, are any other small game like doom unlocked by xbox live only, cheers guy's .