Using VNC with dumb terminals

[Michael T Nelson]

Right, I have a few quick questions for the list. First, here's some 
background information:

Basically, I work for a business which installs and maintains computer 
systems. On one site in particular, our client has quite a few dumb 
terminals (AXEL AX3000) in use. Apparantly, they support graphical VNC 
sessions, as well as the text sessions which our system uses.

This client has just signed up for broadband Internet access, and would 
like me to come up with some way for those of his staff without PCs to 
use the Internet. Conveniently, he has a server which is only a few 
years old, which we have just replaced. I was thinking of installing 
Linux on the (otherwise redundant) server and running VNC on it.

In summary - this is what I would like to know:

1. Is is possible for the VNC server to provide, say, just Mozilla to 
VNC clients (with no desktop environment like KDE or GNOME). If so, how 
complicated is this to configure? I'm pretty new to Linux.

2. How hard is it to get decent performance from such a system? Will the 
additional network traffic slow down existing traffic?

Please ask me about anything else which might be relevant.

Thanks in advance for any help you can offer,
Michael Nelson