First of all you need the beta of HTW installed, then follow this guide:
Campaignmap:
Convert the two jpgs into "tgas" (which you will find in this zip).
You could use "Irfan View" an picture viewer to convert them in the tga format (you find it with google).
When you have converted it into tga´s (both: MapTex.jpg and MapTex2.jpg converted to
"MapTex.tga" and "MapTex2.tga")
then put them into your "textures\campmap\Hellenic" folder.
Portraits:
To make the mod runable go into your "campmap\Portraits" and rename the vikings folder there to "Hellenic".
Then: Put the "Northtribs" folder from the zip into the campmap\Portraits\Hellenic folder.
That gives you most viking portraits in the mod:
If you want to have ancient portraits you have to put them manualy in the Hellenic folder (read the
readmes of the portraits, which you can download in the org too).
Now the beta should work.
But remember: Many things grafik will be not in this beta: They will be in the release
version.