Just out of interest, is it possible to share an application over a network? i.e., software installed on one Mac on a network, is it possible for another Mac to share/use it somehow, across the network?

i.e., to log in to another Mac over the network, call up a file whose software only resides on the Mac on the other side of the office?

I think the answer's going to be no.

To save you asking, the network is 4 x Macs all running Tiger.

Thanks