DP Southern Pacific C44-9W: How can I change it to 3 Digit RoadNumber?

Yes I know there are SP Dash 9's with 4 Digits, but I wanted to use 3 Digits to recreate it like a SP AC4400. Does anyone know how I can do this?
https://www.railworksamerica.com/forum/
https://www.railworksamerica.com/forum/viewtopic.php?f=29&t=12113
ColoradoRailfan wrote:No where is the file to change the Digits at?
Hack wrote:Provided there's a blank in the alpha set, you should be able to either (space)nnn, or nnn(space).
ColoradoRailfan wrote:Ok, I see the Dash9_Digits.BIN in the
C:\Program Files (x86)\Steam\steamapps\common\railworks\Assets\RSC\DonnerPass\RailVehicles\Diesel\Dash9\Default\Engine\Textures
And I open it up with RW Tools and the Primary Numbers 1-6 are in the GP9 Folder.