Ok, so that is actually what I had to do. Nipped into Paris and grabbed the cheapest Kingston that the board supports (256Mb PC4200) which set me back €20, which for this exercise, has been pretty damn good value for money. In the end, I had to flash my BIOS all the way up to 1.7 (which is NOT listed on the US site, only the Taiwanese) due to it hanging on a post code of 2A with my PC6400 RAM in. Now it's all in and working fine, so I'm off to do a reformat/Windows reinstall
Take heed if you invest in this mobo.