Blending and Depth Testing

Alright, I've started my own particle engine, and it's been doing great, but the trick is, it looks nice when you blend just the particles, and the particles only. The trick is you would have to draw the particles first, but you have to do it with depth testing disabled, which means everything else draws on top of it. Heres what it looks like:

When its drawn last, and blends with everything:
http://server5.uploadit.org/files/Rasico-Compare1.jpg
http://server5.uploadit.org/files/Rasico-Compare2.jpg

Depth Testing Enabled when Drawing:
http://server5.uploadit.org/files/Rasico-Compare3.jpg

Any soultions?

Based on the pictures I don't understand what you are getting at.

Please explain more.

If you look at the pictures, you see how they blend into different colors depending on the background, yes this is normal, but not the desired result. I only want the particles to blend withthemselves, but if they are drawn first, then anything else drawn is on top of them since depth testing is enabled while those particles are rendered. I'm looking for a way so I can get the particles to only blend with each other, but not the backgrounds, but I really don't know how to do that :(.