iMac OS X 10.6.8, didn't come with any disks...how do I create an install disk
You can use software like Parallels or VMWare Fusion to run Windows alongisde/inside OSX. Those options won't require you to have an OSX install disk. They do require you buy that software and have a liscence for Windows 7. 

Not dual boot, but I find it more useful.

If you need an OSX 10.6 install disk, Craig's List and EBay have them. It might be easier to just update to 10.7 or 10.8 (if you computer supports it) and use a USB drive to create a Lion/Mountain Lion installer using Lion Disk Maker: http://blog.gete.net/lion-diskmaker-us/