Netware and Windows 2000 Professional

We are a medium corporation with about 125 clients on site. Our server runs Novell 4.11. We are using W95, W98, WNT, and W2k on our pc’s. The problem is with w2k and the novell netware client 4.8 and 4.8sp3. We are having all kinds of problems with browsing the network, including not being able to browse at all, browsing but with slow response from Office 97 documents, and with HP printers. We have removed NDPS from our clients, but this problem still prevails. Policies? Any ideas welcome. So far, we find W2k and Novell client 4.71, 4.8, and 4.8sp3 nothing but a major pain….