Multi body boolean operation

Hello,

I have two parts...one is a human femur bone, and the other is a prosthetic implant.

I hv to combine these two, meaning, insert the prosthetic part into the bone by performing boolean operation.

As of now, I start with the femur and insert the prosthetic part into the on screen document. But I can orient or change its location to adjust its position into the bone.

Also, to remove the material from femur bone, I try to use the indent feature, for which femur is target, but I am unable select the whole prosthetic part as tool body region.

I am using SW2008 premium.

Please help.

Manu.

SolidworksParts And Features