spyglass88,
If your still there I might have an answer that may help you.
I know from expiriance on the pc I can add units by going to the pidaicons.txt file in your civ folder, scroll down a little ways till you see somthing like this #ICON_PRTO_Settler, ext. to add a settler you would simply highlight, and cut this portion of the settler, and then under the next two settler program lines click and past. Then change the name of the "settler", to "Nordic_seattler" then copy and past the next two program lines and past under the new Nordic_seattler this will tell the game witch graphics file to look for.
Next you need to open up the civilopida.txt folder and scroll down to units section, here you should see this #PRTO_Settler you will see a couple of lines of this symbal ^^ then some text describing the unit . Do the same thing here copy and past using the name Nordic_settler where ever where the Settler appears, I don't think you should neet to use the _ to separate Nordic and settler every time.
then go into your editor open up teh edit units window and click the add button, then type Nordic settler, then down under one of the windows you'll see a PRTO_Settler replace this with PRTO_Nordic_settler. Then to the left you'll see a unit icon box, here you'll need to chose the settler Icon to use for your new unit, and of course set the peramiter of the unit.
I hope this helps, I know it's not recources but they are in the same folders as the units and the process to install them should be the same. good luck let us know how it works out.