All clear, Smulan. Actually this is not a big problem as the option of the map in the msd displayed in BC will do seen that all map info are mantained . I just wanted to be sure that there was no mistake in .img splitting being not so expert.
One question more: in GMapTool I used a new FID (2579), different from the ones of the 4 separate regions. Is it correct doing so?
However, I wl follow your instructions and I wl try the simple solution you have given me to get the map in the PC just to learn something new about maps. I wl keep you posted. Many thanks.