I would create an automated installer using a tool like vLite. You can put in all your info and get into windows without having to do more then boot to the CD. Look at a tutorial here:
http://www.intowindows.com/how-to-create-unattended-windows-7-installation-setup/
The most likely reason you have this problem is that the chipset driver database the disk has doesn't have the driver for your computer. I've run into this a few times with windows XP and I had to slipstream a driver into the package to make it work. You may not need to do that if they have the network driver. Windows 7 can contact microsoft and get updated drivers once you get into the GUI.
[EDIT]
An alternate approach is to clear the drive completely. Either delete all partitions or write zero's to the drive by using a program like killdisk. The purpose of this is to setup a blank drive for the windows 7 install. When I was reinstalling windows after a motherboard change, I had to start with an empty drive or windows couldn't use it to install.
Once you get the windows 7 system up and running, you can then resize the partitions using something like EaseUS. You can then install Ubuntu to the newly opened up space. I'm not a linux guy so I can't really help with that spot.
So assuming that you can get a properly slipsteamed disk, you should be able to get it dropped onto the system and make it work.
[/EDIT]
