The problem with CC is you get one error message but the problem is elsewhere.
Try this: take the Install txt file, take a fresh CC5 installation and copy the files from the Alamein plugin over the old ones in the main folder, Data/Base, Graphics and the sfx files. Then delete the stock files in Maps, Campaigns, Ops and Battles and copy the ones from the plugin into the right places as the Install txt says. The whole map pack goes into the Maps folders. Don't forget to put the Index.mpi into the maps folder.
It is a long way but you can be sure that once you have done it you have it. I have just installed the Alamein mod that way and it is running.
... have installed some 5 or 6 mods this way, takes time but no problem later.
