Q: Windows 7 will not boot after installation on mac pro

I have a mac pro 2006, and wish to install windows7 on another internal drive, when I follow bootcamp to the point where it says load installation disc for windows 7, it tries to load, but then I get an empty folder with a question mark in it. So then I tried an install on just an internal hard drive not using bootcamp, this time it seems to do a full installation, but when it tries to restart I get a mac symbol, with a no entry sign, any help please.