acewarlock's recommendation is valid. I've added, deleted and moved multiple phones using this method. I've found the moves to be more reliable when I move them in groups of not more than 8. I had it happen a couple of times where a phone got "lost in transit" when I was moving more than 8 at the same time.
One thing to be aware of, though I don't think it will apply in this case but perhaps in the future, is that you NEVER want to move a Symposium linked phone in software. Even if the phone has been de-aquired by the Symposium, it can screw things up (I recall a Nortel Tech Bulletin about this some years back).
I'm curious. Since both card slots are in the same loop/shelf, why do you need to move the card from slot 0 to slot 5?