If you are running under Windows XP then you should follow these further directions:
If you simply want to convert shn>wav mkwACT will run fine on XP right out of the box.
However, if you want to encode .wav>.shn (w/ seeking as .skt files or appended) it becomes a bit trickier ,(it will also encode from .wav>.shn w/o any seeking fine.... but that suck's ; ).
XP comes w/ a backwards compatibility option.
To run mkwACT in Windows XP, change the compatibility mode for mkwACT to "Windows 2000" by:
* Right-click on the link to mkwACT in the start menu or desktop
* Click properties
* Click the Compatibility tab
* Click the checkbox for "Run this program in compatibility mode for:"
* In the pulldown menu, choose "Windows 2000"
*Apply the change
Now that should have mkwACT running 99% correctly (We still haven't been able to get it to let us batch files to it by highlighting a large group of files , right clicking on them and choosing to "convert to wav" or "encode to shn", but drag & drop will still work in batches fine and it otherwise works as it always has).