Have a look at
http://www.snapfiles.com/get/sharpkeys.html which might do what you want, and it's free. I haven't tried it but it should at least allow you to remap the Del key to the Pause/Break key.
I have read somewhere that it isn't possible to remap the Fn key on a laptop since it doesn't actually send a signal when it is depressed, it only modifies the signal of a second key that is pressed when the Fn key is held down. There is a small chance that the Ctrl key will be the same, but I'm pretty sure it isn't and you'll be able to change that too.