I went through that at my last job.

The VP had already made up his mind to dump NetWare and Linux ("Heh, heh. They were running servers on P200's. Now we have real servers." And he is right. Those P200's are gone. Replaced with quad 800''s or better.)

If you can get the focus shifted to MONEY!!!, then your battle is over.

Just show that a Linux training class costs $1000 (or there abouts), while a Windows server license costs more (depending upon the number of people accessing it).

Then, project into the future, based off of your past experiences.

When did you move to NT?
Win2000?
WinXP?

How much was paid in licensing?

With Linux, you don't pay for licensing.
And you'll have to pay for training in either case.

I just hope that you have someone who can listen to a monetary discussion rather than trying to inflate his resume with "migrated existing legacy systems to World Class infrastructure".

Did I mention that my old company is laying off lots of people and having the worst sales year ever?