Blending in Photoshop

[Grifter730]

I'm going through tutorials that I'm finding online, and I'm having a little bit of trouble. I'm using:

http://www.teamgt.com/francis/art/aliensteps/how02.htm
and
http://www.teamgt.com/francis/art/jokersteps/joker.htm

Those are the two tutorials I'm following. My problem is that I can't seem to figure out how the guy is blending his colors. On the first link, look at the transition from step 4 to step 5. The color blending on the guy's forehead looks really cool, but I can't figure out how he's doing it. I'm assuming this guy is using Photoshop, because the second link says he's using Photoshop 7. Anyone wanna give out a few brush settings or tell me how this is being achieved?

[Romulus]

Wow those are aweseom =D..I like the first one best shows alot of Character to that guy =D

[killing.people]

in photoshop7,
holding ALT will turn your brush tool into the eyedrop tool.
on your NUM pad (with NUM lock ON) the numbers are hotkeys for opacity.
he is using a pressure sensitive digital tablet.

here are two colors to blend:
red ---------- blue

hit 5 on your NUMpad for 50% take a blue and stroke inbetween the colors:
red --purple-- blue

hold alt and select the purple you have created.
hit 2 on your NUMpad for 20% and makes two strokes that will overlap the edges of the red-purlpe and purple-blue.

that is a simplified way that i shade, looks like he used the same concept, it becomes obvious once you do it more often.
hope this helps.