If you don't have the source code, you could stop the software driver by placing a jumper on JT7 pins 1-2.
Then you could create a script to do the above writes with a series of rs232 commands such as:
wr16 1A 1A5B 42
wr16 1A 1A5F 00
wr16 1A 1A61 06
...
You will need to do these writes after the digital video is being provided to the ADV8005 TTL inputs.
-Matt