That book isn't going to help much with the rigging - largely because nobody knows much about the subject.
I figured the principal lines would be these:
A stay, leading forward from the masthead to the bow. It had to be adjustable, so it could be slacked way off when the mast was lowered.
A backstay leading aft from the masthead. (It wouldn't necessarily have to be adjustable.)
Two or three shrouds on each side.
A halyard to hold the yard aloft. (Yes, the Vikings lowered the yard to furl the sail.)
A pair of braces from the ends of the yard running aft.
A pair of bowlines running forward from the leeches of the sail.
Several old sources also show an odd line that has no modern equivalent: a simple arrangement of blocks and line running down from the foot of the sail to the deck. Its function, presumably, was to assist in controling the sail when the ship was working to windward. (A sail made of wool would be really clumsy.)
Like I said in my "Gokstad Ship" thread, nobody knows where all those lines were belayed. I described my solution in that thread - but I can't claim to be certain about it.
I don't think much beyond that is known about Viking rigging.
Youth, talent, hard work, and enthusiasm are no match for old age and treachery.