Is yours modified to work without the discs or is that stock ?
Stock. Besides having digital versions, any 360 game can be installed to the hard drive (the disc is still required, but just for a quick ownership check).
Okay , that seemed like the best option for me . I'd heard that at least one of the disc-less mods can get the console banned if you do it wrong and then log it in to Xbox-Live .
yes but like I mentioned you should be able to install any Xbox 360 disc game on the hard drive, BUT I don't think there is a way to install Original Xbox games onto the hard drive.
you can only play Original Xbox games on the Xbox 360 off the disc. but you can save your game save files to the hard drive just not the entire game itself.
again worth mentioning you can't even play an original Xbox games on the Xbox 360 without an internal hard drive. Not quite sure if you can use an external hard drive to play them though.