I'm not positive, but I think this should be under the smartxx forum, as I believe it is a chip from the same people..
Other than that, nope, no experience with these chips whatsoever. But if it says its flashable, and you have a method of flashing it from your PC using the LPT port then you should be fairly safe. Make sure and backup the current bios and copy it to your PC before you flash the new one, just in case.
I know of no reason why the latest xecutor2 bios wouldn't work..