Thanks Caty, thats cleared it up, Didnt realise I couldnt have them both in Mapsource & in Homeport, so if I uninstall the Inland waterways from Mapsource, I should in theory see the same Inland charts in Homeport using my SD drive.
I'm just used to using Mapsource so much, I got a bit dependent on it.
Time to shift my preference to Homeport, so.
I'll uninstall my G2 Vision charts, that don't display the correct info anyway, out of Mapsource.
I'll try time permitting.