Issue Booting from DVD Drive

-BIOS recognizes my LG SuperMulti drive in Setup as an Atapi CDROM, and it is listed as the first option on Boot Device Priority

-If I use the BBS Popup, the Atapi CD Rom is not a listed option

-I have tried to boot with a copy of the Vista Home Premium disk (my ex took the original and has since lost it herself --she says--), and it ignores the disc and loads Vista from the HDD

-I tried with several other types of discs that should be bootable, and it just ignores them as well

-I switched the jumper from Master (where I, in horror, found it) position, tried with CS and also as a Slave

I need to run CHKDSK on the main drive to repair some obvious errors Vista is reporting. When I schedule the CHKDSK from within Vista to run when the computer reboots, that command is similarly ignored, and Vista boots right up, with that annoyingly happy little "I'm still ignoring you" high pitched little simpering -- never mind . . .

I'm tempted to just go buy a new copy of Vista Home Premium, but dangit, Windows 7 comes out soon, so it's like throwing money right out of the window, because I'll want the new OS as well.

My biggest fear is that even with all the tweaks and tiny Safe Mode fixes I keep doing, that the drive will fail completely before I can catch it (I have backed up important information, but who in their right mind wants to reinstall all their programs and play all their games to get back to the point where their saved games had them???)

Any help would be greatly appreciated.

**Please note that this post may be miscatergorized; I'm not sure how to find exactly where it should go.

No other optical drive -- could the floppy be interfering? BIOS is set to this boot order: CD, Floppy, C: Drive