1. How can I enable the servers to have SQL 2005 use 5 or 6 GB of RAM? Is that possible?

Enable the /PAE switch in boot.ini if it's not already...

Hi again

You're right when you say "I have since read that best practice is to have both nodes identical" that is even "very" best practice.

1 . No you don't need...

Excuse me, but it seems that not all of your questions have been answered yet.

See this kb article for info regarding correct memory setting and general info (follow the other...