Similiar situation, but my backup server is in the back of our warehouse at the far end of our manufacturing plant (as far from the main computer room as possible for disaster reasons). Using PCAnywhere saves me about 3 football fields worth of walking, except for the once or twice a week I have to go rotate tapes to/from the library.
A remote control app is your best option, but you can do it with a built in part of ArcServeIT, although I'm not real sure how ArcServe licensing would view this:
Install the AS Manager on your workstation, then from any of the main AS pieces (like Device Manager or Job Status) click on the icon of the little tower PC (I think it's supposed to be a server) all the way on the left of the button bar. You should be able to choose the server you want to administer.
I used this method for a while, but it can be frustrating sometimes. Example: Doesn't always show all of the tapes correctly, even after you do an inventory.
If you can talk someone into spending $200 go get a remote control app. Remember to get two licenses, one for the server and one for your workstation.
Monkeylizard
-Isaiah 35-