[newbie] Dial on demand

[Mark Annandale]

Hi Guys

Has anyone come accross a simple explanation on how to set up dial on demand 
on mandrake 8. I would like the rest of my family, on their 'doze' PC, to 
access the net using the modem on my Linux box. 

I have the two machines networked together and can ping either machine from 
either end.

Thanks and regards

Mark A