>I have a SCO Unix server running SCO Advance File & Print Server, which makes the Unix server look like at Win NT 3.51 server to all of the workstations. Most of my workstations are Win98 with just a few Win NT 4.0 workstations.
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>Problem: I have an Excel spreadsheet that is 24MB. On Win98 machines it takes about 5 minutes to load the file into Excel, on Win NT 4 workstation it takes about 30 seconds! All computers have 100Mbps NIC's. At first I thought it might have been a bad cable but I took the network cable off the back of a Win98 machine and plugged it into an NT machine and NT still loaeded fast. So, I'm pretty sure the problem has to do with the OS itself not the network. Any ideas of settings in the registry or anything that could be making my Win98 machines slower at retrieving files?
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What are the memory configurations of the machines in question? Also, what is the swap file/paging file size on both machines?

To test whether it is a memory problem and not a network problem, use the Win98 machine to just copy the 24MB spreadsheet file from the server to itself. If it does it relatively quickly, then you know its not a cabling issue but probably an aplplication issue.