To install BusinessMan on a PC, you will need at least FileMaker PRO version 10 installed.
If you do not have FileMaker PRO installed, the latest version of FileMaker PRO can be downloaded from http://www.filemakertrial.com/
Once FileMaker PRO has been downloaded and installed, download the zip file containing BusinessMan (available here: http://www.businessmancrm.com/download.
When the file download has completed, run the BusinessMan_Enterprise_Setup_1.0.exe installer file.
Once the BusinessMan installation has completed, open the file:
Start Menu -> All Programs -> BusinessMan Enterprise 1.0 -> BusinessMan
You are now running BusinessMan.