I just wanted to post this because when I did a search I got only 1 hit ! Luckely it contained the solution.
Here's the story of me trying to deploy a VSTO 2008 Word template to a laptop with Office 2003;
I figured out, using the VSTO trouble shooter (see my previous post) what was going on on the machine, and on the actual target laptop everything checked out ok. But, still an error:
"File or assembly name Microsoft.VisualStudio.Tools.Applications.Runtime, or one of its dependencies, was not found." when loading the VSTO 2008 based word template in Office 2003.
Now what? I desperately googled the exact error (see above). It resulted in 1 hit, a post on a forum and 1 reply (the guy answered his own question! thanks Viking!). Turns out there was indeed a word.exe.config on that laptop, I'm still wondering how/why it got there. Removing the config-file solved my problem, the template now loads, I wonder what I've broken that required the config-file in the first place.
Here's the link to the post: http://forums.microsoft.com/MSDN/ShowPost.aspx?PostID=453951&SiteID=1
I hope this will help someone else in the future....