So my girlfriends brother happened to have an xbox laying around, which the DVD doesn't work on (it tries reading, but it says dirty or scratched disk). I wanted to replace the HDD and the DVD and add an xecutor3 or some other mod chip preferably cheaper, not sure which ones are decent (Just need the chip to play backups from HDD, XBMC, emu's and roms and other simple tasks.) Now here are my questions: 1) To install the mod-chip do I need an original dvd drive, if so should I just buy a laser, and replace his. If not, can you guys give me a link to how to install some other dvd drive or let me know if there is a solution in these forums? 2) Which mod-chip meets the specs I mentioned above and is cheap? (Solderless please) 3) Finally, replacing the HDD can I use any size drive? (meaning 500 gigs, etc) Thank you in advance!