SkylordJoel

I am creating a new mod, well sort of addon for Forestry by SirSengir (It has Forestry integration) where a new fruit called Oranges (already coded that in, don't need help on that) gets processed in a Squeezer (added by Forestry) to create Orange Juice. (which I have yet to code and is a liquid) I was wondering how to add a new recipe to a squeezer and actually create addons in general - do you put the api files in the Eclipse workspace? Thanks in advance, SkylordJoel