I get paid by several people. SInce each is under $600 I do not need a 1099 misc. But do I need to enter each of them solo under the Additional Income or can I group them together?

You can add them together if you received the money for similar reason and enter the total.  I recommend keeping a list of how much you received from whom, in case the IRS inquires why no 1099MISCs were issued (to show the small amounts)