The consumables list for alchemy is far too long in my opinion, and i'd like to split it into either potions / battle / guardian / flask... or split it based on the vial type it uses.. anyway, i'm not sure how to get started, i cant see how it filters things into catagories currently.
Have you looked at ATSW (Advanced Tradeskill Window)? It lets you create custom categories. You could either use that yourself or look at it's code for examples.
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"You'd be surprised how many people violate this simple principle every day of their lives and try to fit square pegs into round holes, ignoring the clear reality that Things Are As They Are." -Benjamin Hoff, The Tao of Pooh