Just read your OP again... I suspect you may have a 'disconnect in expectations'. The SPOT device needs to be turned on and in 'tracking mode' before anything will appear in a map (either on SPOT or Spotwalla via the XML feed). Nothing appears on the map until then.
FYI - I typically use Google Map to plan my routes (as it give me access to fuel stop opening hours info etc.) - if you use Google's My Maps then you can plan your route and export as a KML file to import as an overlay to your Spotwalla trip - but in terms of 'certification/verification' requirements, it is your on the road, live SPOT locations in support of your ODO/DBR photos that is key (i.e. proving you were, where you said you were, when you said you were there.).
FYI - I typically use Google Map to plan my routes (as it give me access to fuel stop opening hours info etc.) - if you use Google's My Maps then you can plan your route and export as a KML file to import as an overlay to your Spotwalla trip - but in terms of 'certification/verification' requirements, it is your on the road, live SPOT locations in support of your ODO/DBR photos that is key (i.e. proving you were, where you said you were, when you said you were there.).