When I click on your bitly link (http://bit.ly/Guk85) I am redirected to a file with version "1.4.7" in the file name. Is that just a typo and it is really the version for 1.5, or has the link been mixed up?
forge shows the mod installed correctly, and everything is configured in config.txt, I do not know why, but my chickens no longer drop feathers, but it worked before ... That is because I updated the forge or incompatibilities with other mods? (I have no mob mod installed on my 1.5.1. only mods for blocks and tools).
Well, it's not up to me how people use it. My preferred method is to wait until I have a spare 125 iron ingots to create 25 hoppers, then build a 5x5 floor of hoppers leading to 1 chest with carpet over it in 1.6+. When I'm impatient, I start with a 1 block are to start off and expand as I get spare iron. The feathers get close enough to the hopper with carpet to get picked up by the hopper.