Rear toe approx +1.5 (as you would expect on a rear wheel drive)
Front toe approx +0.5 (surprised at this one!)
Positive toe is toe in, IIRC, so a little toe in is what I would expect. Half a degree is quite a bit for the fronts.
RWD cars tend to corner better with a little toe out at the front at the expense of straight line stability so you don't want toe out on a RWD road car generally (especially considering the Omega has been known to wander anyway). Toe in at the front generally gives greater straight line stability and worse turn-in.
Parallel to a little toe in (enough to ensure it doesn't go into toe out under braking!) is probably the best compromise and certainly what "feels" best to me on the road. YMMV.
If I had access to the kit I'd have a play and see what suits me best! Start with 10-20' of toe in and see how it drives.
Of course all the suspension angles interact, tyre choice comes into it and what suits one car won't suit another. :-/
Kevin