Ok, so, I recently bought a Game of the Year edition/complete edition of AC2 - that is to say, the version which has all of the DLCs already on the disc.
I've played through and finished it, including the two extra chapters, Battle of Forli and Bonfire of the Vanities.
My problem is this: the extra locations, the Templar Lairs, don't show up at all in my game-world. I've found the entrances to them - the doors marked with the Templar crosses - but I can't get into them. There is none of the white mission-start glow, nothing in eagle vision mode, no nothing.
Ubisoft tech support was absolutely no help, suggesting I go and read through the f