Idk if it will work. Mem speeds tend to go along with the fsb of a processor. And older rams tend to have different pin counts. Just read elbatrop1s' guide on ram.
Also, i recomend that he gets up to date and buys some ddr 400 ram. Its mad cheap to. Just for a value select stick. As i doubt he will need good ram, if he's flying with that old stuff. :P
And that ram (133, 266) is actually worth quite abit now adays. Since its discontinued.