http://www.wowinterface.com/download...fo.php?id=4117
FilterTradeSkill allows you to filter your trade skills (including rogue poisons) with an intutive filter that allows filtering by name, description, and the item's reagents. Check out the screanshots to see more...
Note: The first time you load it, it may not show anything in the trade skill frame. Just type something into the edit box, and everything will be peachy. It should only happen the first time, never again.
Sadly this will not work with enchanting since enchanting uses the CraftFrame and this modifies the TradeSkillFrame