I can only set my team logo to either the football helmets provided by yahoo or the Yahoo Avator for fantasy football. I want to set my team logo to a different picture. How do I upload pictures and set my team logo to the uploaded picture?

I wana create logo for my trading firm but i would like to see some logos of trading firms to do it in a better way.

I like to paint logos, but I try to combine 2 different common logos into one logo that looks familiar, but is not an exact duplicate of either. My question is, is it legal to sell my artwork, or am I going to have problems with Coca-Cola and McDonalds getting all bent out of shape if I morph thier logos together. If thier is some law, can someone reference it?

I am going to start my own clothing line with a simple tee and logo.Is it more efficient to make the logo and print it at home.Or is it more efficient to get them printed by a company? I kind of want to do it at home,so is there any precautions I need to take,like-should I use sew on or lamination logos?Where could I find good lamination logos that won't wash off in the washer and dryer?