Using IIS 7 for visual studio 2003 in Microsoft Vista. We can have both VS2003 and VS2005 in the single system and for VS2005 the default Server is IIS 7 ,since the IIS 6 and IIS 7 can not run in single system the IIS 7 manager will disable the II6, So we can make the IIS 7 as comparable to VS2003 by enabling the Compatibility option in the control panel

Click the Turn Windows features on or off then in the popup window check the IIS 6 Management compatibility

Now run your VS2003 web application in admin mode ,this process will enable the VS2003 to use IIS 7