Vanquished has a point. Though, it's nice of ye' to create a tutorial on how to make the map, if you also add some screenshots, members that aren't in your group would possibly be impressed and want to join. Merely use the code below to insert a screenshot(s) into your post by modifying it:
[IMG]-Insert image URL here.-[/IMG]
You can upload your screenshots and get an URL for it through sites such as Photobucket, Tinypic, Mediafire, etc. Then, merely copy/paste the URL of the image and embed it into your post using the code above. Easy.
If you decide to post any, I'll be eager to see your creation. I wish you luck on your roleplay.