Office student 2007 install on windows 7 problem

Hello,

I'm trying to install Office home and student 2007 on a new la[top I just purchased. I have installed office on just one other machine, and should have 2 installs left. when i load the disk in my laptop, I need to select run.exe manually, and the only option I get is to change the installation (which I can't, cause I haven't installed it yet)

Any ideas on how to get this program installed?

Thanks!