Using a Rush class

So it wasn't until recently that I started using a rush class on Modern Warfare 2. The reason I never used them is that, it seemed like I was dying a whole lot. That's because I was not using the class right. Here's a few tips on how I started using my class more effectively. SO my rush classes are setup like so:
Primary weapon is a SMG (ump45 or MP5k work best to start with)
Secondary weapon is a handgun (I like to use the Magnum)
Marathon
Lightweight
Commando or Ninja (both have advantages)

First of all Never run through a wide open space. If there is a wide open area that you have to run through, try to hug the wall. If you meet someone in this wide open who is a distance try to zig-zag as much you can. You can either zig-zag to them and melee, or use your SMG. I usually take the safe route, and zig zag until they reload, and blast them with the SMG.

For each level develop a few different paths that you can run. These paths should offer the most cover, and increase the chances that you will have close encounters with the enemy since this class limits your shooting range. Once you have commando pro unlocked, you can develop unique paths that involve jumping from very high places down to unsuspecting victims. The cliff on Afghan is a good example of this.

If you are going to Rush into a room, you should still try to enter tactically, since shotguns are this classes worst nightmare. I.e. you should check the two far corners first, then the two close one. Don't worry too much about claymores, since many times you can sprint through them, with little effort.

Don't let the way I have my classes set up limit your options. Be creative, and figure out what works best for you. Just try to remember that the ultimate goal of this class is speed, and lethal close quarters combat.