Unlikely, given that the only purpose of OS9 Helper is to bypass the check for a G3 or later processor, which is required for 9.2.x releases. The fact that the 9.2.1 CD has worked (as far as I gather) suggests that isn't the problem - I reckon it could well be the issue with different localisations of the updater that I think is what I encountered. The error message that it's producing will tell us whether this is the cause. Alternatively I seem to remember seeing a thing about "big system morsels" errors with the 9.2.x updaters - I've never got one but apparently they can occur randomly, and I think Apple have some info about it somewhere if that is the error.