Thanks for helping out PA_Willy, very appreciated.
Chaney, these files are indeed for Paul's DCG, not the stock DGEN. DCG is however only intended for the stock game, what these files do is simply enable all the planes in DBW so you can use them too, but you have to put them into campaigns yourself as all the original ones also only use stock planes, but once they're in DCG that's easy.
DCG is an alternative to DGEN, you can use both if you want to, but generally most people go for DGEN replacement mode which is the easiest, where DGG backs up your DGEN file and replaces it with a copy of DCG, which also has to be named DGEN or the game won't recognise it, but you can always tell the difference as the new icon has DCG written on it! Using this mode you can play just as you would normally with missions being generated directly by clicking the Apply button in-game, just as if it were the stock game. You can also reverse this to get DGEN back at any time.
You can install DCG anywhere on your machine, except over a network, but putting it in the game directory itself seems to make sense to me. I have it in the Missions folder, as that way I can access any of the default template missions in FMB for editing, but wait until you're more familiar before trying that, but it doesn't really matter where it is as long as the paths in the two ini files are correct; one in the DCG folder and another in the game root folder. Use the set up wizard in the top left menu to set the path to your game folder and your DCG folder, and IL2 version (should be 1946 of course).
Once it's installed and running you can choose the mode you want under options, best and easiest to activate replacement mode, you can also replace NGEN for co-ops if required. Then you only have to click on the little globe, choose your airforce and campaign, create the campaign, close DCG and start the game. Then just continue as normal starting the campaign in IL2, just select user defined DCG campaign on the list and continue as always, if you replaced DGEN with DCG you can continue through the campaign by simply clicking on Apply after a mission, the rest is automatic.
DCG is really very simple, but any new program is unclear until you're familiar with it, just takes a bit of practice until it all becomes second nature, bit like riding a bike.
You can use any mod plane as long as the data is there in DCG, which is why I started these files so everyone doesn't have to do it themselves, and any stationary objects too, try adding some of CY6's amazing C&C objects to a campaign template mission, just start with dynamic weather, and DCG will put it in for you in every mission, bliss!
You can also use modded maps, which DGEN cannot, but these are a lot of work to add but some have already been done in some third party campaigns, but play the game with DCG first, fiddle about later.
There are no conflicts with other missions/campaigns, you can still fly single missions or static campaigns, even DGEN if you want, just disable "replacement mode" to restore your backup of DGEN.
This does all raise a question though, as originally I didn't want to explain how to use DCG here, as it's not my program rather Paul's, and he does a pretty good job of it anyway, but perhaps a very basic introduction in the first post would be useful for new users wondering what it's all about?