I need to use the company's proprietary maps, so can't really use bing or other provider.
this is ok in Deepearth, you can use any source you want for the maps
The maps are currently in tif -not sure if supported- so I must be able to take those tifs and produce something DeepEarth -if possible- can consume.
you would need to convert the images to a format that Silverlight/DeepZoom control can use
There is not a single map, but many, determined by min/max lat/long and I'm asked to only display information on a single map, so no composition.
you need to only display sections of a map, I am not clear on what you mean here?
It has to be SL4, since the app has other views using it.
there is a SL4 version, read the forums and look at the code to make sure you can achieve what your after
and a newer version "2011" but i am not sure if that is SL4 or SL3 you would have to check
someone else may comment with more information?