A possible way is that kix32.exe can encrypt your script one-way.
By calling this script kix32.exe may recognize automatically
such file and decrypt it internally. It may slow your script a little
bit, but without the usage of temporary file your code can be very
secure.

Other information about this topic:

code:

---

  http://kixtart.org/cgi-bin/ultimatebb.cgi?ubb=get_topic&f=2&t=000570 
    codec + compress
  http://kixtart.org/cgi-bin/ultimatebb.cgi?ubb=get_topic&f=2&t=001749 
    kix2exe

---

Greetings.