hrm. If my old P166MX with 48MB ram running win2k would loose half it's memory when it connects to a network, I'd be lucky for the machine to have enough memory to finish loading windows, let alone start up Photoshop and my scanner software with outlook running in the background
Seeing as my machine runs fine with all the programs that I commonly use for scanning and modifying images I don't see that as being true
Also there is absolutly no reason that I can think of that the ram would be affected by connecting to a network. Sure you loose a bit when TCP/IP and any other protocols are loaded into memory, but the only way this could take half your memory would be if you only had 2-4 MB or ram, in which case you probably wouldn't be doing much on a network anyway while performing operations that would need RAM...