Features:
When using FinalGather in animation (especially on a render farm) it's common to pre-render a Fg map only (or low antialiased images first) and FG Freeze when rendering the camera flight. There is a rough description here http://forums.cgsociety.org/showthread.php?t=356092.
This workflow reduces for flickering in the final rendering as render time FG points cause flicker.

This script retimes a copied animated camera to speed up the pre-rendering and lets you set some prescale on the camera so you get additional fg points at the edges of the camera. Works with keyframes only. Bake other animation types before using script.

Install:
Put ks_finalGatherCamera.mel in you script directory. Start the GUI by typing "ks_finalGatherCamera" in the script editor.

Usage:
Select render camera to copy from Option menu.
Set your settings, hit copy button.
Use this retimed camera for fg map rendering only.

If you use this for a project please drop me a line.