after you convert cab to oem just put it in the OEM directory of the kitchen. what kind of kitchen are you using? for old style buildos package creator should make an option.xml with the correct settings for it to show up in buildos. for VK, calk has included the stock taskbar, I do not know of any with a "stock" TF3D, I uploaded dcd's kitchen with geny r.15 manila 2.1 added to it, there is no stock 2.1 that I know of though...
here is dcd + manila 2.1:
http://forum.ppcgeeks.com/showthread.php?t=86049