getting error in SQL server 2005

i am not able to install sql server 2005

i am using visual studio 2005 version

getting warings....like

System Configuration Check

- WMI Service Requirement (Success)
Messages
* WMI Service Requirement

* Check Passed


- MSXML Requirement (Success)
Messages
* MSXML Requirement

* Check Passed


- Operating System Minimum Level Requirement (Success)
Messages
* Operating System Minimum Level Requirement

* Check Passed


- Operating System Service Pack Level Requirement. (Success)
Messages
* Operating System Service Pack Level Requirement.

* Check Passed


- SQL Server Edition Operating System Compatibility (Warning)
Messages
* SQL Server Edition Operating System Compatibility

* Some components of this edition of SQL Server are not supported on this operating system. For details, see 'Hardware and Software Requirements for Installing SQL Server 2005' in Microsoft SQL Server Books Online.


- Minimum Hardware Requirement (Warning)
Messages
* Minimum Hardware Requirement

* The current system does not meet the recommended hardware requirements for this SQL Server release. For detailed hardware and software requirements, see the readme file or SQL Server Books Online.


- IIS Feature Requirement (Warning)
Messages
* IIS Feature Requirement

* Microsoft Internet Information Services (IIS) is either not installed or is disabled. IIS is required by some SQL Server features. Without IIS, some SQL Server features will not be available for installation. To install all SQL Server features, install IIS from Add or Remove Programs in Control Panel or enable the IIS service through the Control Panel if it is already installed, and then run SQL Server Setup again. For a list of features that depend on IIS, see Features Supported by Editions of SQL Server in Books Online.


- Pending Reboot Requirement (Success)
Messages
* Pending Reboot Requirement

* Check Passed


- Performance Monitor Counter Requirement (Success)
Messages
* Performance Monitor Counter Requirement

* Check Passed


- Default Installation Path Permission Requirement (Success)
Messages
* Default Installation Path Permission Requirement

* Check Passed


- Internet Explorer Requirement (Success)
Messages
* Internet Explorer Requirement

* Check Passed


- COM Plus Catalog Requirement (Success)
Messages
* COM Plus Catalog Requirement

* Check Passed


- ASP.Net Version Registration Requirement (Success)
Messages
* ASP.Net Version Registration Requirement

* Check Passed


- Minimum MDAC Version Requirement (Success)
Messages
* Minimum MDAC Version Requirement

* Check Passed


- Edition Change Check (Warning)
Messages
* Edition Change Check

* To change an existing instance of Microsoft SQL Server 2005 to a different edition of SQL Server 2005, you must run SQL Server 2005 Setup from the command prompt and include the SKUUPGRADE=1 parameter.



so plz ans me....urget...
thanks in advance