It's alot easier then the overload of information here lends itself to be. I would suggest watching Shugs videos on hammocks. which can be found at the begining of general hammock forumn in a sticky ( a thread at the begining).
as far as your basic question, i do not know what kind of suspension actually comes with your dn , but I have read that the eno slap straps stretch alot. most of the ones i have seen on here use 1' or 1 1/2" polyester webbing/straps to wrap around the trees which should be from 10-15' apart. and then its a matter of how your hammock actually connects to your suspension, wether its carabiners, s hooks, fixed loops with descinder rings ..etc . So in order to get a better answer we would need to know a little more about what you have in suspension at this moment.
but once again look for shugs videos they explain alot, and in the first few even..
you can even search it on you tube also..
good luck your gonna have fun and enjoy it!
It's not the boulders that throw us off balance, it's the pebbles beneath our feet