I'm not sure what you mean by Magic Particles.
Feel free to use any of the textures that come with the program, and the ones that come in presets you download should be fine too. If you want to create your own, that is great. It can sometimes get a bit tricky, but here are some basics. Malone has written a basic tutorial on creating texturtes here.
It is written for Paint Shop Pro, but the principles apply equally in Photoshop.Also, I have put together a tutorial on creating textures from photographs here.
Keep in mind that in order to submit your preset, you have to have the rights to any images you use to create your textures.
Once you have textures you like, you basically adjust the parameters until you get the effect the way you like it. It is actually easiest to get the movement the way you like before you apply the particles, as it will speed things up. You can also turn the textures off for this reason in the Canvas menu, by selecting Preview Emitters. When you get things looking the way you want, you can create a preset by right-clicking the object in the timeline and selecting Create Preset.
Other than that, it will just come down to the specific controls and settings, which will vary greatly depending on the effect you are after. If you need more specific help, just let me know for which aspect of the controls.