How can I make a playlist on my Samsung Captivate default music player?

So I just got my samsung captivate and it works great, and i have a lot of music on it. but i would like to know how to make playlists right from my phone. i have the default music player and doubleTwist. if i cant do it right from my phone, how can i do it on doubleTwist for my computer? and if it is possible to make a playlist from my phone, what music player apps do you suggest? please help!|||depends on the app you got, most cases the default music app couldn't do this.