Hello, computer wizards, I've got another question for y'all.

So, my problem is this: I am unable to use the "Pin" function on Window 7's taskbar after launching Roller Coaster Tycoon Deluxe (#1, from GOG.com). Specifically, I want to be able to choose between multiple Steam windows via the Taskbar / Pin / whatever, but I cannot select them; if I attempt to click on one of the windows, I click "through" the window, and it does nothing. ...I restarted my computer, and it solved the issue, but after I re-launched the game, I am faced with the same problem. I guess it has to do with the old resolution it runs? (The game was made in 1999).

My second question is in regards to adding the game to my Steam library. Again, I bought it off GOG.com, so I am aware that it's not a "Steam" game, but I was able to add it to my Steam library as a non-Steam game, and runs properly, but I cannot bring up the Steam overlay...and if I alt + tab out, I cannot get back into the game (I get an error). Again, I assume this is because the game is so old?

If it matters, I have two monitors, both at 1280x1024 resolution.