Hinkel made
92nd Highlanders already. I don't know if it works with the newest patch, but even if it doesn't it's 40 seconds of editing the troops.txt so that the unit in-game name will be correct (don't copy troops.txt from the .zip, it's made for older version of the NW). If the newest patch modified the .brf with british uniforms, then rename the highlander meshes from your NW's mmbrituniforms (so you can have backup if you screw something up), then copy the same meshes from the Hinkel's .brf file to your mmbrituniforms. Do the same thing with their bonnets in mmbrithats. Also, I don't know if the Hinkel's highlander's use their own textures, and not just edit the in-game ones, if they are new, then copy the texture and materials from Hinkel's .brf so that your in-game unit won't look like shit (or just will be snow white, because it won't have textures). If you need more help, PM me.