A quick search for WIN FreeHand 3.1 download led to this abandonware site:http://vetusware.com/download/FreeHand% ... S/?id=7005
This download would get you around needing a floppy drive and make installation much easier. I don't think you'll need instructions beyond following the install program and using your serial #.
I can't say how it will run on Win 7 since I'm on a Mac but I do have FH3.1 on my computer (under emulation) and used a Mac abandonware site to get it-even though I own the original floppies. Works great.