You click on search, and then look at the other 6 topics about this in recent months! I hate to sound like a broken record, as new ones DO sound better....BUT - try a little of help yourself before asking others too. Doing a search would yield the answers to your questions without the wait, AND would tell you what the problems of adding extra engines are as well.

Common people - time to look yourselves! We have a VAST amount of info here, but peeps just keep asking the same stuff over and over again instead of looking........