How to make one-shot particles freeze at end of life-cycle?

I have an elipsoid one-shot particle system that has anmimated UV’s on it. Once the particles have finished animating, I want them to freeze on the last frame and not disappear. Is there a way to do this?

Check out the documentation on the particle emitter here:
http://unity3d.com/support/documentation/Components/class-EllipsoidParticleEmitter.html

If it doesn’t have to be truly permanent, you can just up the max and min energy of the particles to an appropriate size (I think they’re in seconds). Once you’re done with them, just destroy the emitter.