09-18-2010, 10:43 PM
You can install Windows 7 without using Boot Camp but it requires a lot more work. And since you wish to have four partitions on your hard drive, you can't use the Boot Camp assistant. What you'll have to do is create the partitions with Disk Utility.
But here's an easier way: Use the Boot Camp assistant to create one partition for Windows 7 and go ahead and install Windows 7 to it. Install all your drivers from the SL DVD and get Windows 7 running OK. After Win 7 is setup and OK, reboot the machine with your Snow Leopard DVD.
After it boots from the DVD, exit out of the install process. Click on the top menu item "Utilities", "Disk Utility". Highlight your hard drive on the left side (top entry). Click on "Partition" on the right side.
From here you can create two additional partitions. Just be careful and take notice of where your Boot Camp partition is and most importantly, your MacIntosh HD partition. Don't touch the BC partition at all but instead, create the two new partitions from your MacIntosh HD. After you create each partition, you'll need to format them and give them a name.
After all that's done, press apply and then OK your way out. Reboot and you should have four partitions.
Before doing all of the above, make absolute sure you have two backups of your hard drive: 1. A complete clone using SuperDuper or Carbon Copy Cloner and 2. A good Time Machine backup.
Good luck and let us know.