I write this assuming you're flying v2.3. If not then this response may not be of much help.
Don't install v2.3. (Don't trash it either, it took ages to download)
Just (re)install v2.0 then patch v2.5.
Gmenfan is right though, if its the new jewel case Flanker 2.5 then there's no need to patch to v2.5 because its v2.51.
[This message has been edited by Potato Bug (edited 06-03-2002).]