Someone from here was nice enough to send me a paper on exactly this topic.
Thank you man.
For completion of this thread (if someone is finding this with the search function), for a zero house edge, one should insure (if playing 1 hand):
{20, BJ, 19, AA, 11-9, 18, Soft 13-17, or 8} (based on S17 and infinite deck)
Quite interesting, if playing 2 hands, one should always insure at least one hand, and insure both hands if hands are:
2 x {20,BJ,19,AA,11}
10 + {20,BJ,19,AA,11}
{20,BJ} + {19, AA, 11-9, 18}
20 + {4-7, 88, Hard 12-13}
where {...} means "any from ...".
Of course, which hand to insure is a free to choose.