Did some testing, got it right the first time, so, this is what you need to do.
1). Disconnect masterfile (go to masterfile under settings, and click it, then cancel.)
2). Change the SystemGfxOverrule to newdawnmodgraphics (this will enable the Nato symbols)
3). go to the rulevars, select the lowest group of them (Direct Prod, Autoreinforce, officerpool) and change the following to these values:
Rulevar 339 = 250 (same as supply radius)
Rulevar 340 = 3 (use all types of transcap available, that is rail, land and sea).
Rulevar 910 = 1
Rulevar 911 = 1
Rulevar 912 = 1
(these last 3 are up to debate on how much you want them to be, or how little).
4). go to a different section in the rulevars, select the one called Enable/Disable features. Change the following to these values:
Rulevar 531 = 1 (so you can change already assigned TO&Es)
Rulevar 532 = 1 (so you can make your own).
5). Almost done. Go into the SFT part of the editor, and confirm that every SFT that can be upgraded to a higher version has the lower versions Reinforcement type. I checked for 2 scenarios, and they seem to already have been set, but just make sure. If not, then Rifle I and Rifle II will need to be mentioned specifically in each formation you build for instance.
6). Save, and your done.
7). If really nice, upload to scenario bank :)