1. Unpack the sources (seems like you got it allready)

2. Configure the following paths for your setup. These variables 
   are located in the file tinyca itself.

@INC                    (location of the directory lib)
$init->{'opensslbin'}   (location of your openssl binary)
$init->{'templatedir'}  (location of the directory templates)

3. Call tinyca, use it  and report bugs :-))