Hi Fantablium,
I'm afraid that the ROM update is a chip swap, not a re-flash. Devices of that age didn't have flash ROM. CE Service 2.x is just the old name for ActiveSync. You can use ActiveSync 3.8 instead of it
(and should because it is better
). However ActiveSync will not work with CE 1.0x. Only H/PC Explorer works with CE 1.0x.