User manual for version 1.0.9 can be found here

Network Asset Manager FAQs

• Why I can't get information from remote computers?
  Network Asset Manager uses WMI (Windows Management Instrumentation). The account attempting remote access should be an administrator on the target computer. Other than that please check the following services on the problem PC:
  • COM+ Event system
  • Remote Procedure Call (RPC)
  • Remote Procedure Call (RPC) Locator
     
• On what platforms is WMI available?
  WMI is available in all recent versions of Windows. WMI is available on Windows Me, Windows 2000, Windows XP and Windows Server 2003. For operating systems like Windows 98 and Windows NT 4.0, WMI is available as add on service and can be downloaded from http://www.microsoft.com/downloads. In the download section search for “Windows Management Instrumentation (WMI) CORE 1.5 (Windows 95/98/NT 4.0). Please note that Windows NT 4.0 requires Service Pack 4 or later before you can install and run WMI.
  
  Some additional software are also required for WMI they are :
  • Microsoft® Internet Explorer version 5.0 or later.
  • Windows Script Host (WSH). WSH ships with Windows 2000, Windows XP, Windows Server 2003, and Windows Me, but not with Windows NT4 or Windows 98. WSH can be downloaded from http://www.microsoft.com/downloads.
     
• Why is Network Asset Manager not collecting data from a Windows XP SP2 machine?
  For remote administration of Windows XP SP2 machine using WMI, you may need to configure the Windows built-in firewall. If the Windows firewall is enabled and not configured to accept a remote WMI connections, Network Asset Manager will not be able to connect to the system. Network Asset Manager will shows "The RPC Server is unavailable" error in such cases.
  
  To configure Windows XP firewall, you need to enable the "Allow remote administration exception" group policy entry. This setting can either be configured on the local group policy of a machine or globally by configuring the global Group Policy settings of an Active Directory domain.
  
  For more details check the following link http://support.microsoft.com/kb/875605
   
• Why I can't get information from remote computer with Windows 2003?
  In Windows 2003, WMI subsystem is an optional component and might now be installed with the default Windows 2003 installation. To manually install the WMI, please follow the steps
  • Open the Control Panel Add/Remove Programs
  • Click Add/Remove Windows Components
  • Select the Management and Monitoring Tools check box, then click Details
  • Select the WMI Windows Installer Provider check box, and click OK.