The documentation is in the doc/ directory supplied with the software.
The file doc/wsmp1.pdf contains documentation for the symmetric solver and the file doc/wsmp2.pdf contains documentation for the general solver.
The WSMP software is supplied via alphaWorks on an "as is" basis. In order to get support, including help in integrating WSMP into your applications or getting libraries built and maintained for platforms other than those in the standard distribution, please contact Anshul Gupta at the email address listed in the documentation. These services are provided for a nominal fee.