Image Sequence Effects

Sup guys. I've made a nice dust poof image sequence in Particle Illusion 3 for when my character lands from jumping, and I have exported it into 50 separate images. What's the best way to go about using this sequence in Unity? I thought about having 50 textures and switching between them, but isn't that really hard on the system? Is there any easier way?

If you can assemble them into a 2D grid in a single image, you can use particle UV animation on it. http://unity3d.com/support/documentation/Components/class-ParticleRenderer.html