[Google Maps API v2] replace G_SATELLITE_MAP

hi all,
newbie question here:
i am creating a map using:
var tilelayers = [G_SATELLITE_MAP.getTileLayers()[0], gTileLayer];
var gMapType = new GMapType(tilelayers, new GMercatorProjection(20),
"My Mapr", {errorMessage:"No Data Available"});

and i would like to replace G_SATELLITE_MAP with our own custom
basemap. i have been looking at the following example to create a
custom map:
http://mapki.com/index.php?title=Add_Your_Own_Custom_Map

but i want to add this as my basemap:
http://server.arcgisonline.com/ArcGIS/rest/services/Specialty/DeLorme_World_Base_Map/MapServer

am i on the right track with what i am doing? and if so, where do i
add in the url to the REST service to access the DeLorme World Base
Map?
thanks,

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