Particle System on Unity 4 tutorials?

Hi guys, new to the whole Unity thing and am currently working my way through the Walker Boys Studio tutorials just to get the hang of using everything. I really can't get to grips with Unity 4's particle system though its a massive difference to the version before (which the tutorials use) and everything just seems to be taking a lot longer than it should with less impressive results...does anyone know where I can find some tutorials on how to use this system and make basic things like jet streams, explosions etc. I did try and search this site but can't seem to find anything! (either that or I'm going blind...) thanks in advance guys!