Your psycho commish usually creates a custom web-site for his league. If you are going to create a website for your league, you will want a scoring program that will organize your league and make your life much, much easier. We use FFLM, but there are many out there that are used and loved by their customers. My advice in choosing one is to hop on the message board here and ask what people use, what they think about them, and for a web address so you can see the format and various reports of that program. There are many variations.
Some leagues give owners the options of different lineups, while others have a required lineup.
I prefer a set lineup, but know many people who like the options. Remember, some free sites give the owner lineup options and others do not. You get the idea. It is important to remember that usually these lineups are used only as options that an owner can choose from. If your league is going to have set lineups, you should use the typical lineup with TE or 3WR instead.