Check out my "tips" post a few lines up...go here (http://rwsmaps.griffel.se/
) and download the "Features Test" test map. When you install it and then use MapSource to push it out to your GPSr, you can see what each type really looks like (in MapSource and then in your GPSr). Sounds like you picked one that is available in MapEdit, but not really supported in MapSource/GPSr.
I used this test map to find out that the 60CSx doesn't have that many different colors in it...unless I'm doing something wrong with some setting somewhere....
I ended up using State Park (0x1e) for the transparent areas, (TYP'd them to change them to transparent), and Airport (0x0e) for the solid areas in black.
Here's what my hunting .MP file ended up looking like. From the "Level 1 Copies" on, I used a source code text editor to block search/replace/tweak instead of doing it all manually in MapEdit.
Name=KS WIHA 2007
;;;;;; Level 0 Areas (transparent when zoomed in close - so topo shows thru)
;;;;;; Level 1 Copies (for when zoomed out - easier to see black than semi-transparent)
;;;;;; Borders (Black line around Level 0 areas)
;;;;;;; POIs (don't have a hunting symbol, so I chose the "Zoo" Elephant)