I work with Dell KACE. I love all things IT and technology related. I really enjoy automated work flows and so right now I am spending a lot of my time working on Software Deployment and PC imaging.
I work with Dell KACE. It can do what you are are asking, however as mentioned by several users above it is more than just a Help Desk service. You can learn more here
I agree with Nigel, once you are moved over you will actually enjoy W7 a lot. The boot times are great and once you get past the unsupported devices things will be nice.