I've just installed Football Manager 2005 and when I open it it says that the CD can't be found. I'm sure I had it working once, but when i installed the latest update it stopped working. I reinstalled and can't get it working again..
I've experienced certain problems with FM on Tiger, but not with the CD not being recognised.
There's a newish FM for Mac forum out there, and there is a solution to some Tiger related issues on there. It's timing out for me right now, but take a peek at http://fmmac.posel.co.uk/ at some point, and you should find a proposed solution within their forums.