I had the deluxe version of H&D and it worked a charm for me, mind you they did get it fixed and working great. Dark Messiah is the only game that I have ever had this much trouble with. I've had strange probs with some of the older Ubi games like desktop colour depth etc but thats been it really.
2 patches later and Dark Messiah still isn't fixed. I literally ressurected this thread with some info that worked for me and wanted to share with other players in the hope of helping.
Mind you, been playing this morning and chapter 9 keeps locking up. Literally play for 10 mins then it locks up So close to the end of the game now and it is giving me grief yet again. I've just managed to purge my soul of Xana so I can use the holy sword of the Dragonclaw, got outside and killed the undead in the graveyard and it locked up. So damned annoying. Arcane know of all the trouble people are having with this but are still yet to come up with a patch to fix the constant crashing.
I was one of the lucky users that never experienced the infamous sound loop on HL2, lo and behold though I get it frequently on Dark Messiah which usually leads to a crash or the game freezing for a few mins while it gets its head round what it is actually supposed to be doing.
I do like the game and feel that it would be a great experience start to finish (forget the RPG side of things as its virtually not there) if it was stable. As a first person fantasy adventure its great, granted it is not as good as quite a few of the other FPS games out there on the market today. But being a fantasy themed game it is decent enough until the expansion for Oblivion hits the shelves.
By the look of it I will have managed to persevere long enough to have actually completed it before a working patch is released. I need to get it uninstalled as it takes up over 7Gb of hard disk space and want to install a few other games!