SQL Server 2005 Cluster Installation

Hi - I have a few questions:
1) Do you know what is the best SQL Server 2005 Cluster installation document?
2) Windows 2003 Server Enterprise x64 Edition: Can I install SQL Server 2005 Standard edition, to create a SQL Server 2005 cluster?
3) To install SQL Server on a clustered (2 node) system: Can you copy the software onto the physical machines (i.e. C drive) and run the installations from there?
4) What is the latest service pack for SQL Server 2005?
Thanks!

1) Do you know what is the best SQL Server 2005 Cluster installation document?
Check SQL Server 2005 Books Online topic "Before Installing Failover Clustering" and "Installing a Failover Cluster "
2) Windows 2003 Server Enterprise x64 Edition: Can I install SQL Server 2005 Standard edition, to create a SQL Server 2005 cluster?
Yes, in SQL Server 2005 Standard Edition supports cluster.
3) To install SQL Server on a clustered (2 node) system: Can you copy the software onto the physical machines (i.e. C drive) and run the installations from there?
You can use CD/DVD or you can copy the installation file to local drives to install...
4) What is the latest service pack for SQL Server 2005?
SP2 + Cumulative hotfix...