Hi Joel,
We have several clients installed on citrix servers. We usually have the exe reside in one directory with the shared data in a subdirectory. Then we usually set up each individual user a directory for local data seperate from the exe's directory (usually on another drive). That way we only have one exe and one set of data to maintain and we don't have the problem of having the users cross up their local data.

Sorry I can't be more specific. Our engineers usually handle this.