>>Ahh, so you've looked at Armadilla before? What do you use then to protect your applications? Refox branding is quite easily gotten around by other programs LIKE refox. <<

One thing about "crackers", besides trying to crack other peoples software, they also like to produce their own products (simply to stump the "experts"). Unlike "commercial products", crackers often provide source code.

Find a compressor, packer, encryptor or whatever you like that comes with source, and modify it to your own liking. The key is not to brag about it (like Armadillo). Part of the key to protecting your code is not to let on what kind of safeguards you've taken. It's the challenge that attracts the most attention.
Of course, each new release of your software, which should be frequent, should utilize a new algorithm in your "protector". And as I said before, throwing in a few foreign DLLs (C, Delphi) doesn't hurt either.

The average thief will be using a crack program that can easily determine what product is being used to protect a particular app; not so if you roll your own: the footprint is unknown. He'll have to resort to Soft-Ice, etc. and start stepping thru your program; something beyond the average, in other words.