Tire sizes and PCM software updating

[DieselDoghouse]

Anyone out there with a '98 truck sucessfully used a DRB tool to update their PCM to accept a larger tire size? I am looking to use at least a 285/75 and need to get the rev/mile to about 630. I'm aware of Abbot ERA's but wanted to avoid fiddling harnesses. I spend an hour of quality time with a Dodge DRB loaded I believe with version 5051 software and it could not get the CPM to allow as valid anything below 676 r/mi (OEM for the 245/75's). Would appreciate new s of a success story or advance info on Dodge releasing another DRB update?? Many thanks!