So I had an idea, I posted it here one (very basic idea) and over at the Minecraft forums.
So to build one of the advanced machines from FTB, it usually requires a great deal of resources and other crafted items. So you're constantly having to go into NEI and look up recipes to the basic components, then relookup recipes for the more advanced components, you have to run around and collect the resources, and you're constantly having to look up ingrediants, then look in a chest, then look up recipes, back and for, back and forth ad nauseum.
So my idea would be something that works alongside NEI. I look up a machine, and click a button or keystroke or something and have a generated ingrediant list, that not only holds the resources required for the specific item I clicked, but any crafted resources that specific machine required. And it'd be a checklist I can open at any time or even keep open the whole time while I maove around from chest to chest to collect the resources. And as I collect a specific resource, it'd get checked off the list.
So take the Mass Fabricator from IndustrialCraft. If you look it up on the wiki () you'll see it gives you a list of the actual raw resources you'll need to build this. Not just the individual components for the fabricator itself, but also the resources to make the components needed for the fabricator. As well as instructions to produce them all, and the resultant fabricator. Get this for ALL recipes in the FTB modpack, and provide a GUI that'll let me open it whenever I want to look at it to see the ingrediant list and step by step instructions, that also works as a checklist for when I accomplish a given step, or collect a resource.
In it's most basic term, and actual and usable recipe book in the game itself. Some way more usable than looking up a single recipe in NEI.