Installation and licencing about MSSQL 2005 Standard edition and clustering mode

Hi,

I have a question about using MSSQL server 2005 standard edition in Clustering mode.
I would like to build a msql cluster with only 2 servers (2 nodes).

I read here -> http://www.microsoft.com/downloads/details.aspx?FamilyID=818234dc-a17b-4f09-b282-c6830fead499&DisplayLang=en
page 5 that you can use MSSQL server 2005 standard edition in Clustering mode with 2 nodes.

But my question is :
Can I use windows 2003 standard edition (Clustering mode managed ?) or I only can use windows 2003 enterprise edition ?

J.Windows 2003 Standard supports a 2 node cluster and SQL Server 2005 Standard also supports a 2 node cluster, so yes.