What do you mean by "protected"? I followed your link, but was unable to download any routine since this action seems to require registration.
But I noticed that each download page had listed the name of the command defined in the routine. So, if the tools are in VLX or FAS format (or even protected lisp), just load them as you load any plain AutoLISP file and call the said command. The compilation only prevent you to see the code, the functionality is preserved.