Hi Craig,
It sounds like you were on the right track: Genome Graphs is the tool we 
have for displaying the entire genome at once.  I am able to see your 
data in Genome Graphs by doing the following:
- load the data as a custom track (which you have already done)
- go to the Genome Graphs tool (
http://genome.ucsc.edu/cgi-bin/hgGenome) 
and hit the "import" button
- select your custom track from the drop-down menus and give the data 
set a name, if desired, then hit "submit"
- select your imported data from the "graph" menu for display
The image should update with a genome-wide view that shows the density 
of the data.  Does this work for you?
If you have further questions, please contact us again at 
gen...@soe.ucsc.edu.
--
Brooke Rhead
UCSC Genome Bioinformatics Group
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