Question : OWA for Exchange 2003

I have been trying to get owa setup so that I can access from external. I can access owa internally from:
http://internalip:8080/exchange/      and
https://internalip:4433/exchange/

I have my certificates in place (have my own ca and created my own certificates). I can ping owa.domain.com from ISA server and it resolves to the internal IP, but I cant access owa.domain.com from web browser on ISA server. I also cant access from external (but im sure until i can access from web browser on ISA then I wont be able to externally). I need help here. I cannot figure out what im missing. This is my 6th attempt at this in 3 years. Surely someone can help me finally get this squared away.

for reference the guide im following is: http://www.isaserver.org/tutorials/2004owafba.html

ISA 2004
Exchange 2003
Server 2003

Answer : OWA for Exchange 2003

Yes.  A refrigerator is a heat pump.
To make the inside colder, it has to make the outside hotter.