>You might try Armadillo,
>
>It's seems to be a very good packer and protector. You can download a trial version from http://www.siliconrealms.com. You'll need the professional version for VFP application, but in fact it will pack any EXE file. (professional version is arround $200)
>
>It has some great features for creating activation keys, limited demo versions etc. They claim to be very secure.

There a numerous Armadillo "cracks" on the Web.

Any (public) claim to being "secure" automatically invites hacking and publishing of the results for bragging rights.