[SOLVED] Custom CSS for IE6, IE7 and others

Hello,

first of all sorry for my bad english, i found a php script for detecting browsers. Now i need to do following algorithm:

if IE below IE7 -> load ONLY my custom CSS,
else -> load normal atahualpa css.

I know how to implement this script I just don't know exact place to put it I think I have to put code somewhere in header.php, but I don't know where.

Thanks in advance for suggestions,
Vedran