Thanks to all for the help. I appreciate the effort you have collectively taken in replying to my posting.
RadarContact: You were absolutely correct - when I eventually found the RAM expansion area (under the CPU heatsink assembly, which I had to remove) there was a 32Mb SODIMM.
I'll now try and obtain a 128Mb SODIMM to take the total up to 160MB.
Fujiflyer