I've got several tutorials at the Cartographers' Guild using Xara Xtreme 4.0 to create maps, rather than retype them here, I thought it might be easier to post a link of the tutorials at the CG site.

Here is one for creating a regional map. I created this shortly after my Celenta map was created (last posted map on page 1 of this thread.)

Regional Map using Xara Xtreme

Here's a tutorial for creating a quick dungeon map...
Dungeon Map

Lastly here's a tutorial using the Combine Shapes function of Xara, for lots of special operations I use in creating maps. While users of Xara should be already comfortable with this function, this tutorial example might show you some unique uses for the Combine Shapes operation.

Combine Shapes Technique for Map Objects.

Some of these tutorials link to downloadable PDF versions.

Enjoy!

GP