[ QUOTE ]
I think you are meaning retrieving it without having it just fall freely to the ground... I think, if that is the case just attach the throw line to the end of the climbing line. When it reaches the friction saver keep ahold of climbing line and throw line, this will allow you to control it all down to the ground. Hope that is what you are looking for.
[/ QUOTE ]
That won't work on a rope guide though.
I think what the guy means is after is this....
When on your way down, pull up the end of you climbign line and attach a krab to it. Flick it over a branch and back to you and clip it to your climbing rope just above your friction hitch. Then continue down the tree. Remove rope guide in usual manner but this time it will only fall as far as the branch you used. Then you can lower it down the rest of the way.