.spc is a converted Primo speedcam file, .spe and are .stxt too (I think - the truth is I never heard of those extensions)
These files should work without any problem in Primo and recent Becker(Primo) releases. Just put them in the (empty) content/speedcam folder. These work for me in Primo2.0 and Becker.
.spdb and spud are converted (by iGO8) speedcam.txt files.
Now this is strange :
When I put the .txt file from my post (
http://www.navitotal.com/showthread.php?12044-speedcam-SCDB-Europe-14-Jan-2013) in an empty speedcam folder, spdb and .spud files are created by iGO8.3 and speedcams then show in the map screen.
But when I put the files from Jack in an empty speedcam folder, that should work in iGO8.3, but doesn't show any speedcams
By the way, both the .spdb and spud should go in the speedcam folder together.