here's the thing,
at home i have
one desktop turned on 24/7,
one laptop turned on all the time when i'm at home,
another laptop turned when the kids are here and,
a PS3 (used for streaming movies).

if i don't turn the machines on in a certain order,
they all end up changing their IP addys.

the problem i have with this is on a couple of machines,i have some ports forwarded for certain programs *cough*.

how can i stop each machines IP addys from changing?

TIA.

harrytb.