Sorry to hear about your troubles. But I have to share my doubt on this one: There is nothing in the pasted HKN script (this is almost a straight copy/paste from something you found here, right?) that would get you suspended, and they don't scan for HotkeyNet. That is to say, they do scan for things, and they do suspend people as a result of those scans. But not HotkeyNet.

When they ban for unapproved third party software, it is often weeks after the fact. They want you to be moderately unsure of yourself and point the finger in the wrong direction; they are able to conceal some of their methods by doing so. I am just going to guess that prior to grabbing HotkeyNet, you tried something else -- that you didn't find all over dual-boxing.com. If not, then I am sure your appeal will go fine, as there are plenty of people using HotkeyNet with a script that looks nearly identical to the one you pasted... and mistakes are of course made from time to time.

The rest of us here have no information to go on though. Good luck!