@JoeBob256 if you grab the Ext2Fsb and reboot, then you can mount the Synoboot .IMG file with ImDisk. From there you can copy the vender file and edit the MAC's
Since I don't own any MSOffice products I am grateful to Markus Konig for his patcher.
My Question: I take it the serial numbers are not directly tied to the values of the MAC addresses? And they're only necessary if I am running multiple DSMs