If the shoes are from a props library, they should be parented, if they are in a figures library then they should be conformed, but they will only conform to the figure they were created for. You can parent figures though, if you want to usethe shoes on a different figure. Adjusting them can be a pain though. P4 figures do not use conforming shoes AFAIK. What I always did was pose the character with the shoes on in the default position, parent the shoe to the foot, then lock actors on the feet and toes. Once you are done posing, unlock the feet, and adjust the shoes.