How to install
Navigate to \FTB\Unleashed\minecraft\texturepacks and drag and drop the texture packs in there. Once in-game goto the Options Menu and select Texture Packs and select the one you want to use. Simples.
Sphax Pure BDCraft
Sphax Pure BDCraft - 64x Texture Pack
Sphax Pure BDCraft - 128x Texture Pack
Seems to show Tinkers construct and Thauma fine, not sure about IC2 etc as I haven't used them yet but it possibly just needs the BDcraft addon packs if those don't work.
Halfmad, hope you didn't mind me editing it slightly. I'm also uploading a 128x version of the texture pack and will link once its uploaded - Monkey