Thanks all, and glad to help out.
I have used the same process with Picasa and it worked fine. I can not say anything for TrueCrypt, I just have not tried it.
Here's the rub. Inorder to work the .deb package must have been built to the linux filesystem standard. (As Vector is.) Also, this does nothing for dependencies.
If it goes wrong the only way to remove the package is to seek out and delete each file, one by one.