Need Assistance Installing on a Different Hard drive

Hi
Have installed Win 7 H.P. on 80GB drive and now wish to use a 250GB drive but Win 7 will not install to the 250GB drive.
I have tried disconnecting the 80gig and booting up to the 250 gig with the installation disc and after starting the procedure reports 'Windows cannot be installed to this disc. This computers hardware may not support booting to this disc. Ensure that the disk's controller is enabled in the BIOS menu.
I have tried running the 250 gig as Slave and running the install disc choosing to do a clean install to the 250 gig D: drive. The report is 'Installation not successful. Changes being undone'.
Running Disk Manager shows both drives are healthy and formatted as NTFS.
The computer is a TINY COMPUTER P4M266 with a Micro-Star International motherboard MS 6787 for which I do not have the OEM drivers disc.
When running Windows XP the 250 gig drive was used for data storage with My Documents migrated from the C: drive.
I would like to replace the 80 gig with the 250 gig running Windows 7 Home Premium, can anyone help?
Thank you
Jim

 

Done that.
Thanks

 

Hi TonyT
Yes, I have considered that solution. However in that configuration it takes a very long time for the machine to boot-up and that is why I prefer to use just the big drive.
If I can't resolve the outlined problem then I will run the 250 as slave.
Thank you for your response.
Jim

 

Hi Tony
The last Q. first I did a clean install per instructions. With just the 80 drive running it works fine. When I try to use the the 250 nothing goes right. Tried to re-install XP SP2 this pm to the 250, tried twice, done a re-format NTFS, everything seems to load but when Windows is ready to run it just does not boot up, on both occassions the system is asking for a system disc in the CD drive. Going to give it up and settle for what works.
Thanks Very Much
Jim