Were it only that simple!!
The pattern is 5 cables seperated by sections of reverse stockinette so it's impossible to know WHERE to add the tw stitches (pattern doesn't give break down of stitches per section).
I may be in luck though, the "test knitter" on ravelry did answer my PM, she said she would look into it anc get back to me.
GinnyG on Ravelry, I'd LOVE to be in your "friends"