disconnect the hard drive with windows 7 on it first
then reconnect it once you are done
this keeps your windows 7 being included in the boot record
then just select which drive to boot either in the bios or by pressing the appropriate f key to bring up your boot menu
Thanks mcnumpty23, Your advice was exactly what I was thinking to be sure w7 didn't and couldn't get messed up.
Well it was a success. Everything went smooth. Installed vista then Win 8 pro. Hooked up my Win 7 drive and crossed my fingers. At first it loaded the Win 8 but then showed the boot options.