Superman Logo Help

Hi guys,
:D I am a new user of photoshop please help me do the following.
Q1. I am designing a customized logo. Its like superman symbol. http://docs.google.com/Doc?id=dctgg53g_46fnc4gh
Problems:--:confused: :confused: :confused:
1. Notice its border? It's rough! how can i smooth it? Why is it rough?
2. Notice the triangle within it... I want to make these type of triangles (incomplete at one edege)..What tool should i use? I used line tool this time....
3. I want to make two more triangles like the first one. but each will increase in size. How to increase the size of the other two triangles when i am through with the first one.
4. Besides this logo. I also wanto to make Superman returns logo. Please guide me how to do it.

I humbly request you all to help me. And answer my questions. Please solve my problems.

For smoothing the rough edge. at first Ctrl + Click the layer in question to Select it. Go the Channel Palette and create a new Channel, as i have created one and call it Smoothie. Then go to Edit/Fill and choose White. Ctrl + D to Deselect that layer. Then go to Filter/Blur/Gaussian Blur or Ctrl + Alt + F and choose a setting range from 2-3. Then go to Image/Adjustments/Levels and drag the two end sliders closer to the center until you are satisfied with the smoothness of your shape. Then choose the 'Load Channel as Selection' button on the bottom of the Channel Palette.Then go to the Layer Palette and create a new layer and call it 'Smooth'. Then fill the new layer selection with the color of your original shape(this case black) and then hide the original 'notsmooth' layer from your document. and wallah there is no rough edge on your superman logo.:eek: