Hey guys!!! I had the EXACT same problem for me and my girlfriends PDA (we both have 5500 and I have OZ 3.2 on it with the drivers installed from the CD) and kept getting the TERMCMD_ERR_NETWORK_RESPONSE problem. I do think this is a serious problm that does need to be addressed in the FAQs. There is, however, a way to solve this. The way I did it:
Right click on your intellisync on the task bar, click on "Communication Options." Now I use USB so mine has the USB selected and the PDA IP Address has to be 192.168.129.201
Now goto your PDA and click on "settings" and "Network" then (if you have OZ like i do) you should be able to see "Ethetnet (usbd0) 192.168.129.201" If you only see "Disconnected (usbd0)" then that means the PDA is not sitting on the cradle, so put it on there and close and reopen the program to refresh it.
Please remember to have your original drivers installed (ones that came with the CD) when you have OZ ROM installed. If you have Sharp ROMs installed then get the install package that came with the ROM, these can be found at the SHARP website.
For the latest intellisync: (note I didnt need to install these for my OZ)http://www.sharp.co.uk/zaurus/support/support.htm
With the PDA on the cradle goto Start -> Control Panel -> Network Connections and you should be able to see at least one Local Area Connection. One of them should have "Sl Series (NDIS 5)". Right click and goto "properties". Then goto double click on "TCP/IP" then goto "Use the following IP address" then write 192.168.129.1 and subnet of 255.255.255.0 then OK and OK again. Try the file transfer and it should work now. If anyone want any help in this then PM me.. L8erz!!