Are you using 2.0?
I see a huge boost in rendering times even with just 2-3 computer slaves. There really isnt a whole lot to setup. Have the slaves on and running the spawner. Make sure all of your licensing is setup correctly, click render. Assets are transferred quickly and I see a boost in both my LC pass and IR passes. If it's working, you will see more render buckets at final pass time. If your machine is running low on RAM, just open the 64 bit spawner on your machine and check "Dont Use Local Machine" and just make sure localhost is checked on in your DR setup. With this method, you will not see you LC pass, but it is essentially 64 bit rendering on your local machine because you are no loner confined by SU's 32 bit environment.
Now this is all assuming you are on 2.0, if not, then DR is pretty busted and I wouldn't recommend it.
For more info on DR, see the manual
http://help.chaosgroup.com/vray/help/sketchup/150PB/distributed_rendering.htm