How do I get x360ce to work in Wine on OS X?
I'm assuming you could click on package contents on the wrapper you have now made and click wine, then go to install software, and etc. to run x360ce.exe. You then could have the file moved to the right location mentioned in the x360ce guide. Haven't attempted this yet though, but if this doesn't work out, you could always button map using enjoyable, the second guide has explains how to do that. Good luck!