Any way to pause an EXEC?

["Jayson Smith" <nospamratguyspambegone@nospamplease.bellsouth.ihatespam.net>]

Hi,
I am working on a crack for an old DOS 3.3 piece of software, with the
author's permission.  The crack defeats copy protection and applies to
several versions of the software.  It loads two Basic programs and changes
them a bit.  I was going to use an EXEC for this, and have users just EXEC
the file to crack their copies.  I need to insure the proper disk is in the
disk drive before cracking the program, and don't want to put the TXT file
on the software disks.  My first thought was to have the EXEC write a simple
program to prompt the user to put the proper disk in and hit any key with a
"GET A$" statement but the keypress is taken from the EXEC rather than from
the keyboard, not only rendering it useless but also messing up the next
command which is now missing the first character.  So my question is, is
there any way to wait for a keypress in an EXEC file?
If you wish to reply privately, note that my Email address is scrambled.
Please remove references to the hating of spam.
Jayson.