Only works on exisiting (forge) configs
It will (try) to cleverly arrange your IDs so that they're all grouped.
It's 100% compaitible with forge (I copied their configuration loading/saving code)
It will put all your BlockIDs below 4096 and your ItemIDs above it.
Makes sure that item IDs are above 4096 (in theory), can be changed by using -Didres.needsBigItemID=false
Has support for NEI and InvTweaks configuration (which use non-forge config formats)
(by 'has support for' i mean 'ignores')
Lets you choose configuration folders/files that you wish to process first
Descends into folders as well.
Don't run on existing configs (if you do, BACK THEM UP) - I HAVE NO RESPONSIBILITY FOR WHAT HAPPENS!!!
See MinecraftForge-License.txt