During our installation process (InstallShield Script) we are looknig to the path of IIS in the registry in HKLM\Software\Microsoft\INetStp\PathWWWRoot. On Server 2003 this was an explicit path - on Server 2008 it is a REG_EXPANDED_SZ which places %SystemDrive% in the place of the actual drive letter. Any ideas on how do deal with this since all of our web components are not being installed.
You may try calling the Win32 ExpandEnvironmentStrings API to resolve environment variables stored in REG_EXPAND_SZ registry values. Alternately, you could replace %SystemDrive% with the value of the WINDISK or WINSYSDISK InstallScript variables.
