A technical question.......the pois you dl from TT. Did you put them in the NA map folder? If so, did you go to Preferences-->Manage POis--> Show on Map and check off the new custom categories you downloaded?
Now this.......
Just because you have dl, say, a custom poi category of Home Depot, does not necessarily mean that every HD in your area may be included in that file you downloaded.
Also this......some poi files you download from web sites include just the .ov2 file, not an associated .bmp file. Therefore, even if installed properly and selected, a specific poi point will show as a red block, not as a point with the logo of the place you dl.
There are lots of sources of pois out there:
Some are:
--this site in the poi forum
--http://www.gps-data-team.com/poi/
--http://www.poi-factory.com/
--http://www.poifriend.com/
--http://www.gpspassion.com/forumsen/default.asp?CAT_ID=20