After lotsa pictures, talking with people etc. Here'* MY conclusion. It works for me, but you may be different.
Types
Low beams are concentrated, and covered up in some areas, they won't go very high up at all, based on the housing design.Their goal is keep the oncoming motorist happy, but still get the road right infront of you. High beams aren't held back at all, and shine light up and down, and very far to the sides.

Fog lights are a short distance, VERY wide angle beam. They are meant to cut thru fog onto the pavement, so you can see the painted lines reflect. They are low, to avoid rain/fog/snow reflections to the driver.

Driving lights are made to light up the road far ahead. They are a very narrow "pencil" beam, much like Euro lighting specs. They are like High beams that hit the road only. They don't go nearly as wid though.

Upgrades
Upgrading can be difficult. If you drive in the city more, you'll have different needs then someone on the freeway, or on a 2 lane road on the way to smellbird'* pad.

Upgrading the low beams, will get you good brightness, but it wont change your lighting pattern much. If you're in the city all the time, this will be best for you. You're more visible to others, and you can see better in the field of light. Recomendations - Sylvania Silverstars/Cool Blues; PIAA platinum extreme plus, HID conversion.

Upgrading high beams will help with animals a lot, and basic off highway driving. High beams aren't as concentrated, and therefore, newer bulbs will make the total output brighter most of the time. However, most high beams are already sick-bright, so doing this is normally precipitated by changing out to match low beam light color. Recomendations - Sylvania Silverstars/Cool Blues; PIAA platinum extreme plus

Upgrading fog lights will help a lot if your stockers don't do anything (mine sure as hell didn't), and you drive in inclimate weather a lot. They'll be nice in the city, with all the lines, but will do the most in ugly conditions. The best colored fog lights are yellow, which cuts through snow better then blue. Stock wiring, will (and should) turn off with the high beams on. If you have high beams, you're not cutting thru fog, vice versa. Recommendations - Blazertech'* 3200, or their yellow one. (3000?) or Silverstar H3 bulbs.

Doing a fog to driving light conversion is great if your happy with your low beams and high beams, but want extra light at your hand when needed. If you're concerned with visibility down the road, and looking further then 100ft or so, you'll want driving lights. Wire them up, so they can stay on with high beams, and you'll turn night into day. Recommendations - Hella/Optilux 2500 angel eyes

Ok, Jason.....changing the bulbs won't change the lighting pattern at ALL.....you're on the right track here. Let'* see how much more detail we can get here, and do a Techinfo.

Specific brands....maybe a link to Smellbird'* HID kit, things like that? Links to a couple different types of fogs/brands of angel eyes? Yellow bulbs for the fogs to make them REAL fogs, instead of driving lights?

To get a real good idea of how beam pattern are. Wait til its somewhat foggy oustide and get a side profile of how the beams are shining. The only way to really change the beam pattern is changing the housing of the headlight. For example going from our headlamp to projector headlamps. Also with projectors you would be able to change the cut off on them. But as far as changing the lighting pattern. When you get brighter lights you are just more aware of how your pattern was. The purest white bulb you can get is 6000K. Ill get more info when I get time.


Some links about HID'* and parts supply:
http://hidforum.com/index.php
http://www.hidtech.com/
http://www.briteheadlights.com/Xenon...ights-Kits.htm

HID Company'*:
http://www.fet-usa.com/[/url]