Although I do not have RTW as yet being a Brit, from looking at the mod you can change any of the speed figures in the txt file. Appolonius already has 2 files - a "slow" and a "slightly faster" version.
Why do you not try experimenting with the figures yourself until you have a speed (and a fatigued speed) you are comfortable with, bearing in mind every terrain speed should be changed proportionally?
I can see there ending up many "speed versions" of this mod before long!
Tomcat
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