Installing to hard drive?

As long as you don't install both discs on the same hard drive, you should be good. For example, install disc one on your main Xbox 360 hard drive. Install disc two on an external hard drive or flash drive.

yeah I figured it out I just didn't have disk 1 installed FIRST, but thed Disk is still scratched an its only what 2 weeks old, I never took it out of that tray the whole time an the other good news is after re installing it settled down considerably and
I haven't added that HDTV update maybe that was the culprit..

well if your disk was scratched wither your drive is faulty or you knocked your xbox while the disk was spinning............the problem with the xbox its desiged to work on its side or upright , because of that pointless feature the reader is as unstable
as hell and sensitive to the slightest knock , when the disk is spinning at those speeds it doesnt take much to scratch them

It's a rather large install. You can usually speed up installs by starting the install and then putting the console to sleep. The game will continue to install while asleep and since the console will be performing very few functions while in sleep mode,
installation time will be drastically reduced.

No you can't install original Xbox games to a Xbox 360, you can only play from the disc.