areseris on 30 March 2010
I originally played Fallout 3 with the original version. Once the GOTY edition came out, I sold my old one and got the new one. All my old gamesaves worked fine with the new GOTY edition.
From what I can tell, Disk 1 is identical to the original Fallout 3 disk. The second disk is all 5 DLC packs. You install the second disk onto the HDD and then store it away. Everything is run from the first disk. There are no serial numbers or anything associated with the second disk.
I haven't tested it, but I would assume you can simply install the second disk on your brother's HDD and he should be able to access.
