Sorry if this is the second time you see this post but something seems to have gone wrong when I first posted the message so here it is again

After I totaled my wife's car (long story) and after we both got back home from the hospital, it was time to convince her she wanted another car. She was not too motivated to get one and the only car that seemed to interest her was a car she'd seen in Florida and could never remember the name of and that car was....a Crossfire of course. Within 2 days of saying it was the only car she'd be interested at looking at I found one and we went to see it, bought it and brought it home so now, she has her dream car and I have another car I can tinker with. It's a 2006 roadster Limited with 40k miles on it. Only 2 previous owners, always garage kept with a cover on it, never winter driven and never even driven in the rain. The gentleman I purchased it from didn't even know what all the buttons did in the car. I absolutely love driving it and my wife uses it as a daily driver.
Found a few small problems that I was able to fix fairly easily with help from this board (thank you for that) and have notice that our Crossfire has some of the same issues discussed here like a "musty smell' which seems to have been caused by the cover that was on it and the carpeting needing a good shampoo and now the siren and beep that doesn't work at all. The locks, lights, RCM etc. all work but I cannot arm the security system (siren). I've seen a lot of comments on this board regarding the issue and from what I've read, I'm thinking of replacing the siren batteries first before I try anything else, does that seem like the right thing to do or anything else anybody would recommend? Also, I've seen a few posts on parts I should maybe get immediately as they tend to fail more than others (Crank and cam position sensors),any other suggestions?
That's it for now, sorry for the long message and I hope I can get to a point where I can contribute to the board and not just suck information out of it.
Thanks for the help so far, you really have a great owners board and look forward to actually participating in the future.