Waffoo,
The best info I can find from Boeing for the classic (3/4/500), is in the All-engines planning tables for a M0.74/250KIAS descent. Idle thrust, zero wind etc.
From 37000ft to MSL takes 23min, uses 300kg and you will cover a distance of 100nm at 35T, 111nm at 45T and 116nm at 55T. Allowances are included for a straight-in approach with gear down and landing flap at the outer marker.
So lots of corrections to the above figures for the true engines-off equivalents, perhaps the main one being that if you were in a glide you would probably want to be at the min drag speed – approx 210.
Gliding in the sim seems to give about 2000fpm but varies with altitude (amongst other things). For glide angle, try looking at the V/B or FPA on the descent page, I don’t know any figures offhand but will have a look next time I am in.
Incidentally a good article on how to handle the double engine flameout written by one of my colleagues can be found at:
http://www.b737.org.uk/lossofthrust.htm
S & L