It's quite easy to get a shoe in place by conforming it to the model.  But often times I'd like to detach the heel of the shoe from the heel of the foot.  You can see an example in the bottom right of this image.

http://www.renderosity.com/mod/bcs/catalina-high-heels-for-v4-a4-elite/71105

I haven't figured out a good way to do this.  If I unconform the shoe to the foot then I need to manually move it back into place which seems like needless work.  Is there anyway to remove the conform but keep the shoe in place?  Or, is there just an easy way to do what I'm describing?