I have the same situation, one 360 for Live, one with a blaster 360 and Xtreme 5.2, flashed my orig firm back and tryed to buy the maps legitly for another xbox, but you can only buy them once for ONE gamertag, I'm not too pissed, I don't need to go into detail and really take the time to get them off my 360 hdd and hook it up to my computer, waist of time, but just get them off your 360 hdd, and there're plenty of programs out there to help you sign them for another box. You might have to hexedit it actually but, just like when the 9 new maps came out, you couldn't sign them with the original signing software for the maps on the disc, about 99% sure it's the same situation for these two. I see what you're trying to do as a waste of time, but hey... more power to ya.