How to separate objects created using mirror modifier in Blender? I am using Blender 2.56. I created all body parts of humanoid model. 

I used mirror modifier on individual body parts separately. Now I have to merg all the parts to make full body.

Now my question is I want to make changes on only left hand not on both of them.

But mirror modifier is making the changes on both at a time. I applied the mirror modifier even then when I am coming to edit mode and doing some changes both hands are getting modified.

How to separate those both hands and make them independent ?
In fact I got the solution in some other place.

To make the hands separate objects just Tab into edit mode, select all verts (A) and hit P.

Choose Separate by loose parts.

Tab into object mode and they will be two separate objects.