Vista - Help!! Vista won't boot and No System repair option

This is my second time experienceing this.

First with a beta and now with Vista Business. The system will not boot as
it feezes at the bootsceen. Even in Safe mode it does not get past the boot.
When I try the sugestion of putting my install disc in and rebooting to it.
I do not get a the startup option. It tells me that windows is in "setup" as
if I have just loaded and upgrade and begins to load Windows and of course
falling at the boot.

I do not get the install screen to have the option of a repair. Has anyone
had this problem or ,better yet, found a solution. It would be nice to have
the option not to wipe the disc to rienstall. This is crazy. Even if I
wanted to install over my current windows I can't. The DVD will not givve me
a setup option. If I did not have an XP disc, I could not even get in.

Any answers would be appreciated.

iam bennu