I just got a MacBook on Sunday to replace, for the most part, the iMac I've been using for the past 2 years. I have a couple of questions...

1 - in moving my stuff from my iMac to my MacBook, I've been moving various things to my external harddrive and then loading onto my MacBook. will this work for programs I've downloaded over the years or do I have to go back and find all those programs and download them again onto my MacBook?

EDIT - I think I've found what I need with respect to my second question.

thanks! I'm sure I'll have more questions in the coming days.