Dual Boot Windows 7 And 8 On New Toshiba Satellite?

I have a new toshiba satellite p870 that came with windows 8 and I would like to install windows 7 on its second hard drive for compatibility reasons. Every time I try to boot from the windows 7 setup disc it gets stuck on the "starting windows" logo screen and will not proceed. I have tried both booting from the disc and doing a custom install from inside windows 8 with the same result. It was necessary to disable secure boot in the bios in order to get the disc to begin to boot. This computer has 2 hard drives and I am attempting to install windows 7 to a partition on the second drive (the main drive had an error about GPT). I am using a windows 7 professional disc received from microsoft a few years ago to avoid burning a new disc. I have set up dual boot on several other computers but this one is different, Is there anything I can do to get this to work?