JudasIscariot: Simple. Use the command "winecfg" and see if you can set your Windows version to, say, WIndows 98 or 95 in WIne's configuration utility. If yes, then you have a 32-bit prefix. If the oldest you can go is Windows XP, then you have a 64-bit prefix.
kris2424: Thanks! I did both:
kris@kris-Z97X-UD3H:~$ winecfg
kris@kris-Z97X-UD3H:~$ WINEPREFIX=~/.wine32 winecfg
and both go back to windows 2, so that must mean that the first .wine it created was 32bit, which I guess makes perfect sense since I am using the wine installed by playonlinux. Duh! Thanks! Now how do I remove the new prefix I created? I'll google...