I'll admit openly that one of my only criticisms of HPS is the lack of graphics enhancements to their games. Things have improved slightly over the past few years (trenches, for one), but nothing along the lines of IronX's enhancements starting with Long War and going through RSoE.
That being said, I do realize that HPS spends its limited resources on engine upgrades, which I'd rather have any day than fancy graphics, but can you have your cake and eat it too?
I took a couple of minutes on my lunch hour and cut-and-pasted a slew of graphics files from the Maps folder of RSoE and put them into Advance of the Reich, a game I don't play that much, so I figured that if things went FUBAR, I wouldn't be out much at that point. Here is what they look like...
Now, I'm not saying that this is going to work for everything, but I think if you limit yourself to the buildings and terrain and the like, it should look OK with a variety of games.
I'm also sure I'm not the first to try this, but I thought it might be worth a post on here...
Don't blame me if things go bad, though! Back up your folders!