DRAM:FSB 1:1 ratio whas a good thing on DDR era, but with the DDR2 u can have a faster memory speed than FSB speed with no stability issue. Anyway i don't recommend to use this memory at 267-533 MHz DDr for the sake of 1:1 ratio. U have a better,faster,stable memory at this settings:
400MHz- 800MHz DDr ,4-4-4-12 timings , default voltage 1.8v. U may try to overclock this machine, then get the 1:1 ratio and rise together FSB and DRAM frequency. That will be a very good thing to do. Try at least a 333MHz x 11 FSB . BUT then again u will need an aftermarket cooler and good airflow case.