Out of band programming
Here is the info on programming the R100 into the ham bands:
In the R100.COM file change the following bytes:
Offset 0x3A43 from 0xC2 to 0xB6
Offset 0x3A45 from 0xD6 to 0xE0
It would be a good idea to make these changes to a COPY of the original file. This should change the bandsplit from 450-470 to 438-480.
Look at the programming cable here. It should look something like Monty's when you are done.