Teleporting a Read Node
I'm assuming you're using Nuke as your compositing package. If you're not.. Well, uhm.. That could be a problem. Anyway, grab a PostageStamp node. Attach it to a dot or stack of nodes or simply a read node.
Under the PostageStamp options, click Hide Input and deselect the node. Goodness, now we can move that PostageStamp anywhere and it references that stack! But, wait, I don't know what it is, what the original file was, and let's say I do (I really do, all the time).
In the label section of the PostageStamp, enter the following:
Now go ahead and quickly disable and enable the node. Look at that! Now we have a PostageStamp node that references the original Read, and on top of that, I can move it around and not get too cluttered. Wicked. Now all you have to worry about is updating only ONE read should be referenced by a bunch of other nodes. Keep it clean and neat people!
[lindex [split [basename [value [topnode].file]] .] 0]