My environment: Windows XP SP2, Novell Client for Windows 4.91 SP2, wireless broadband showing 3Mbps in Task manager, on Lenovo(IBM) laptop

When using internet, Lotus Notes, various other applications and transferring files, performance over wireless broadband is fast enough and, more or less, as expected.

When I log into Novell, performance is disappointing. In particular, Windows explorer (which has network drives mapped) performs very slowly when traversing directories - task manager is indicating less than dialup speeds. My network support people say this is because of all the packets Netware sends back and forth and that's the way it is.

My question is: what are my options? I guess that my options include:
That is the way it is (I am hoping for a better option)
A different client will help - if so, which one
something else

Any help would be most appreciated.