Particle Animation in Blender 2.45RC1

I’m playing with the particles in RC1, and I’m having trouble ainmating the particles. I’ve created a UV Sphere with hair, and I want the diffrent settings to change over the timeline. The IPO editor has a particles section, but I can’t seem to figure out how to add the keys. If anyone could point me in the right direction I’d appriciate it.

Although I don’t claim to speak with any authority about the new system, you should be able to go to the desired keyframe, then hit "i’ in the buttons window (particle section) and it will allow you to choose which setting to keyframe.