|With a hybrid drive, a mSATA SSD drive would be redundant.|
First, to install Windows 7 on the mSATA drive you would have to make sure that the BIOS would recognize the drive as bootable. If it does not, then that option is out. Second, I would recommend a larger drive to install Windows 7 on, 32GB is really too small, even if you disable system restore and put virtual memory onto another drive, it really is too small. Third, the reinstallation disk (or their website) would have to have Windows drivers available. Finally, without a touch screen, there would be no reason (in my opinion) to keep Windows 8 if you prefer Windows 7 (like me and many others), so I would recommend just wiping the drive and installing Windows 7 from scratch on the main hybrid drive.
Others may have other opinions, these are mine.
You have to be a little bit crazy to keep you from going insane.