Check your emails. You'll find I've just sent you both a revised version of the castle mission I wrote last weekend. I was playing around last night adding in a few things and I found a minor glitch - one of the objectives doesn't get marked complete when you do it. I guess you haven't noticed it yet, coz you haven't survived that long (I'm looking at you, Paul)...!!
So I fixed that, and I've added in a smoke effect coz I realised I hadn't put in any that were "intitially active" - they all get called in the scripting, so I thought I'd show you the other way to activate them too... And I put a very short cinematic thing in at mission startup, kind of like what you get in the IT missions. It's only two camera views (rather than four in IT), but it's enough to let you see how it's done, and I was getting tired of messing about with it by then, and so couldn't be bothered to add in any more!
So delete the copy I sent you the other day, and put the new version in that I've just emailed you. The in-game stuff is the same though. I thought about makin' it easier for ya, but decided I was too cruel for that!!