Sudden-Strike-Maps

Hi. I've tried many SuSt tools to open such files but no go. Can anyone tell me if there is some tool for SuSt Forever to oped edt files. In the file units_edit.sue there are files like a-1.edt, b1-.pck, biggun-.col. The latter two I am able to open but not the edt file. Any help would be much ...