I posted a query on this a while ago, with no response! I've entered as well, for fun, but then received the NavPack the other day and realised that I'm going to have to prep for it. I went to WW at the weekend in the hope of meeting someone who knew about it, with no luck.
It sounds as if, like you, I've entered 'blind'. My navigator is a friend who flies choppers and is used to goldfish bowl vis. so we're both new to it. When I showed him the paperwork at the weekend he looked decidely less enthusiastic.
Any helpful hints greatly appreciated.