Using weapons in unusual ways

[smetzger]

So my question is: Is there a Feat that takes away the -4 when dealing subdual damage with a lethal weapon?

Why yes in fact there are two from the netBook of Feats...
IMPROVED SUBDUAL [General: Offense]
You really know how to subdue opponents.
Prerequisite: Proficient in a bludgeoning weapon
Benefit: When attacking with a bludgeoning weapon and attempting to do subdual damage you do not incur the usual penalties for attempting to do subdual damage. Also, the weapon's threat range is doubled when dealing subdual damage.
IMPROVED SUBDUAL Copyright 2001, Scott Metzger
Balance: 4.15 (Purp 4.00, Pow 3.75, Port 4.50, Comp 4.00, Rule 4.50)

IMPROVED SUBDUE [General: Offense]
You are skilled in making subdual attacks
Benefit: When using a weapon that does normal damage for a subdual attack, you are not subject to the normal -4 penalty to hit.
Normal: Characters striking to subdue with normal weapons do so at -4 to hit.
IMPROVED SUBDUE Copyright 2001, Rebecca Glenn
Balance: 4.78 (Purp 4.30, Pow 5.00, Port 5.00, Comp 5.00, Rule 4.60)

I, of course, think the first one is better