how would I install windows in my Macpro

There are several ways, the least expensive is to use the BootCamp Assistant to add a BootCamp partition to your hard drive, then purchase Windows 8 and install that on the BootCamp partition. You can then boot either Mac OS X or Windows.

Read this FAQ for more infornation: http://support.apple.com/kb/HT5628

You can use Boot Camp Assistant to install Windows. Instructions can be found here:

http://www.apple.com/support/bootcamp/ and the Boot Camp discussion community can be found here:

https://discussions.apple.com/community/windows_software/boot_camp

Or, you can install Windows using a virtual machine like Parallels, Fusion, or VirtualBox. Instructions for each can be found at their respective sites.

You are welcome