I'll answer the second one because it's easier. Click Shift+F9 and it'll bring up the pathfinder pallette. Click both objects that you want to combine and then play with Shape Mode or Pathfinders until you get what you want. As far as how to delete part of a logo on a shoulder, there is an easy way. With the black arrow, click on the outline of your jersey, then duplicate it (ctrl+c) and hit ctrl+f to paste it in front. Now go to your layers and click both copies of the jersey and hit ctrl+7 and it'll put them in a group. Open that group up and you'll see clipping path and path. I usually have my clipping path with the outline and the path whatever color. Why? Because everything below the clipping path gets clipped, so if you have a 1 pt stroke it becomes a 0.5 pt stroke. Now I'd take the logo and place it below the clipping path and you have the logo looks like it's on the jersey but it's clipped where you can't see it. It also works great when you place your shadows and highlights under a clipping path too.