I do not know what is missing or incorrect, but I do a workaround.
Download the XDA Kitchen and unpack it where you intend to use it.
Get +Que PPC's Mirion Kitchen and unpack it on top of the XDA kitchen.
Then go into "XDA\EXT\HERMES\COMMON" and take a look at all the packages. You will see several duplicates. Just remove the duplicates until it all makes sense to you.
The duplicates are there because different people think differently about all the apps. One man's tool is another man's utility, etc.
Building a bootable ROM after this is child's play. Just run "XDA\erviuskitchen.exe", click on "Load ROM" and choose "Mirion_B1 by +QuePPC.erv"
The ROM you create from this should boot just fine. Once you know it boots you can start playing.
This kitchen, by the way, is my favorite, so far.
Mirion on 2shared
Mirion on 4shared
In other words it may be better to stick to the ext folder i already have and just add the things out of the new one i want to use. yeah i agree this kitchen is by far the best. Ive been using it since 1.4