Well I just discovered this forum and I dont know if the answer to the eQSO to Echolink croslink has been answered or not.
I just recently setup a crosslink with eQSO/Echolink using two different computes networked together that also share the same internet access.
A more detailed writing of what I had to do to get it to work can be found on the forums on eqso.org.
If you have any questions in particular you can email me directly at kc4qlp@(spambuster)aol.com [remove spambuster from the address]