I received a ChartPack7 CD with international digital nautical charts of the Bahamas. The files dont seem to read into any MapTech software or GIS software (even with the MapTech ArcGIS extension) I have. The file extensions on the CD are .A01, .A02, .B01, .B02, etc inside each directory on the CD. The directories seem to correspond to charts (I guess) and there is also a directory CHARTHDR that has a text/header file for each chart. Any ideas on how I can view these images, preferrably in GIS?