If you are using it on another system currently and it does work, then it would not hurt to try to see if it will work on XP.
I am surprised, would be surprised if after installing 2.0 it does not try to force you to upgrade to the newest version, or even lets you log into the network.
One of the draw backs to older programs is they fail to connect to the login servers, due to the server asking for the clients version number, the cleint sending back and ack and the server refusing to log the client in.
But if you can presently use 2.0 on the servers. then it might work with XP.
Since no one has answered your question, you might have to answer this one by yourself and just see if it works.