I have determined that you cannot update DF2 using the full update file from the NL website support/update area while running XP. After several attempts at installing DF2 and running the update via the fully downloaded update file, I kept getting the error but when I uninstalled and reinstalled then updated from within the DF2 program itself, the error never showed. I tested this theory again on a fresh harddrive and got the exact same results. Apparently the full update changes this Netcomm.dll file in a way that prevents DF2 from running. I hope this helps the next guy trying to install DF2 into his XP.
p.s. - I only ran the full update because 56k dialup on this file takes approx 110 years....(actually like 90 minutes) and I have a DS3 at work with a zip drive and could bring the file home and try to update it.
Peace, cya on the paintball field !!!
Do you play paintball and live in Florida?
SpaceCoast Paintball