I'm getting the beta now, however I don't have access to another computer to test it on. I use my current computer every day for schoolwork and such, i was wondering if i dual boot, could it mess up even my other files? and other OS?

If you are using Boot Camp, you should not have any issues. There have been a couple of people here within the forums who have mentioned successfully dual booting Windows 7 and OSX.

Have you considered using Vmware fusion, parallels or VirtualBox? VirtualBox is free while the other two are not. I have Win 7 running under Fusion and it's pretty slick.Joe

I also have Win 7 running with Vmware Fusion and it working fine.