Important: If you are installing the 5.1 or earlier on a Windows Vista machine, DO NOT install the program into the C:\Program Files... folder. The UAC in vista will not permit sharing of the DATA properly. Instead install to C:\POS Pizza. Version 5.5 and newer of POS Pizza will default its install to this location instead of program files for better Vista compatibility.
This issue has come up more than once now, so I wanted to address this here. The latest version is much more Vista-friendly.
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If you are installing POS Pizza v5.5 or later, the installer will default to the proper location under Vista.
Scott