I thought I'd start a new thread, since this really has nothing to do with printing cards anymore.
EDIT: Ok, so I just installed Tabletop simulator along with the Dominion cards for it. The controls & stuff will take some getting used to, and I still have to figure out how to put my fan cards into it, but I'm getting started.
They have a little software for card creation packed into it (not inside the simulator, but comes with it), and there's a tutorial for card creation that explains it well. Just watch out you do NOT listen to tutotials that require you to build one gigantic file on your own. The software that's included can export such a printout sheet, no need to do it on your own. I might make a video about this.
I didn't find any card creating software that was included in the download (why do they hide these things?), but I did finally get my fan cards into the simulator, and even played a test game with myself just to see how playing in the simulator works. So I think I'm ready to invite other people to play my cards. So who wants to play who has Tabletop Simulator?
Also, the backs of my cards are not exactly the same as the Dominion cards I downloaded for the simulator. Is there a place I can get the exact card back picture used for the rest of the cards?