Another way to rig high-heeled, rigid boots is to rig down only to the shin. These books are from the neo-victorian outfit for G8F (not recommended because the bodysuit is missing). The boots were rigged to the shins in DS. This allowed me to pose the shins inward to change the pose to the usual in Poser rather than the A pose of G8F. As usual, I exported an obj and imported it to Poser. Then, with La Femme zeroed, I positioned the boots, posed theft  thigh, shin, foot, and toes to fit the boots and then used the pose symmetry command to mirror it. A little morph brush work on the boots produced a good fit.

This is the view from above the ground plane.

Save the foot pose! You'll want it later. Rig the obj to the shins in the fitting room with LF not zeroed.

In the pose room, zero LF and then pose the boots you rigged to fit the shins. Now, go to the fitting room and rig the non-zeroed boots to zeroed LF down to the shins.

Conform the boots to LF and apply to her the foot pose that you saved. You may have to tinker a bit with the pose or polish the boots up a bit with the morph brush, but new LF has some sext new boots.