I have fitted the additional 256 mbytes of micron ram - £18 from Ebay - no problems here.
I updated the ms 6183 motherboard bios to version 1.7 from 1.3 - again no problems.
Connected the exelstor 80 GB drive as master and the 17 GB fujitsu as slave - did not like it could only see 1 drive and the bios limit appeared to be 65 GB.
Eventually just went with the 17 GB fujitsu as master, the 80 GB as slave and working OK.
Maxtor or any drive manufacturers software would have sorted out the bios hard drive limit, but excelstor do not have any software for this.
I could have bought ontrack disk manager but at $50+ was not worth it.
The best option I found would be to purchase a PCI IDE controller - the 133 ATA ones are about £25 - seems too much for this machine, although I may be able to pick up a cheap ATA 66 one on Ebay - will see what my mate thinks.
Wireless adapter installed and communicating OK with my netgear router anyway - hopefully when I take it to my mates it will all connect wirelessly OK with the D-Link router - I am going to fit this to my PC now and set it up.