You will find a detailed description in this PDF-File.

Please have a look also to this FAQ No. 91.

Special information for Outlook^®2003 and Public Sharefolder 1.3: If you have an Outlook^®2003 version installed on the “Server” and in addition the “Public ShareFolder” as Windows^® Service, Outlook^® 2003 will not start.
Please download Service Pack 2 for Office 2003:
http://office.microsoft.com/en-us/officeupdate/default.aspx

and set this registry key:
"Start/run/regedit" =">" click on "OK"

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Windows Registry Editor Version 5.00

[HKEY_CURRENT_USER\Software\Microsoft\Office\11.0\Outlook\Options\General]

"AddUserToServiceSecurity"=dword:00000001

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This key has to be set per every Windows user!

Related Knowledge Base Articles:
http://support.microsoft.com/?kbid=891857

This can apply only with Outlook 2003 and Public ShareFolder as Windows Service^.

Special information for Windows 2003 Server, SP1.

After installing the SP1 of Windows 2003 Server, you can not connect to Public ShareFolder Server. Please read this PDF files to change some settings. After you change the settings you can connect to the Public ShareFolder Server:

DCOM settings:
http://www.publicshareware.com/download/PSF_WIN2003_SP1_DCOM_english.pdf

Firewall settings:
http://www.publicshareware.com/download/PSF_WIN2003_SP1_Firewall_english.pdf