While shoes are some of the easiest things to rig (other than boots), I realize most users don't wanna go that route. However, if they are just plain old shoes and not boots, export the object and reimport as props and they work really well. This won't work too well tho if the shoes are paired and will only export together as one object. If you know a little bit about a modeling program you can split those up and export them out of your modeler as separate shoes, then reimport as I've explained above.

Doesn't take as long as you think. The longest bit is refitting them to your new figure (and the most fidgety) ;).

Laurie