Software Deployment

Hello,

I work for an IT department and we are currently working on upgrading all of our Windows XP PC's to Windows 7 (the ones who's hardware can handle Win 7). We have hundereds of PC's and some of our branches are too far for us to be there for the install. 

I have been using RT Seven Lite to customize a Windows 7 install with all the updates and some applications built in. It's been a trial and error experience but I (mostly) have it working. 

There is one issue I keep having though... I want Office 2007 to be part of the initial install so I used Office Customation Tool and created a silent install .msp. I ran it on a PC and it worked perfectly, no prompts, no reboot, no on screen commands. I want to take that install and somehow add it as an application to RT Seven Lite. It doesn't seem to be working though because it's only taking the install file, and not grabbing the actual files. 

I'm wondering if anyone has any suggestions for me. 

Not just for this problem but for creating a custom Windows 7 disc that has applications already installed. There are just a handfull we want installed with the initial setup but we want it to be done in such a way that the end user doesn't have to touch anything. I also have to figure out a way to get iSeries for Windows installed silently, but that's a question for another time. 

Any help will be GREATLY apprecaited. 

Thanks.