Slow Directory Listing in XP\2000

I have a client who is experiencing an issue with XP\2000 stations, mainly XP. They have a folder\share on the server which contains over 8000 items, mainly all images (.jpg, etc). When the XP\2000 stations access this folder in an app or within Explorer, its takes upto a minute or longer to display all of the contents. This problem does not occur on there Win9x stations. I know others have experienced this issue as well. Does anybody know of any fixes to increase the performance of viewing directory listings of a share on a server? The server are NT4SP6 and W2KSP3.