Reply...
John,
JHS...do you mean Achim's European, Eastern Front, and Mediterranean airfields?
Each package has a hyperlinked readme. Click on the links on the page, download the files they are linked to, and unzip the files. Read the instructions on what goes where.
If the file extension is .dp, they belong in the OBJECTS_DP folder inside your CFS2 installation. If they have a .bgl or .bmp file, most likely they belong in the SCENEDB folder.
You basically have to read and take it step-by-step.