To run a Mouse program, you will have to do the following first.  Extract the 
Mouse interpreter itself from MOUSE.LBR with a Library Utility (like 
NULU151.COM).  This is the file named MOUSE.COM.  Next, select the Mouse 
program you want to run and extract it from MOUSE.LBR.  Anything that ends in 
.MSE is a Mouse program source file.  All files in this library that have a Z 
in the middle letter of their filetype are crunched.  Uncrunch them with 
UNCR24.COM  (included in the library).

A>UNCR24 *.MZE <ret>  would uncrunch all crunched .MSE files.

To run a Mouse program:

A>MOUSE filename.MSE <ret>

I suggest extracting FILES.MSE and HELP.MSE first.  Try

A>MOUSE FILES.MSE <ret>

FILES.MSE is a menu-driven Mouse program which talks about all the files in 
the Library.  It is linked to HELP.MSE, which contains a summary of the Mouse 
instruction set.

Enjoy.  Lee R. Bradley,  Mouse House Software.