FreeBSD on AlphaServer 1000A 4/266

[Santanu Das]

Hi,

This is the first time I'm trying FreBSD and even more, the very first 
on a AlphaServer. I downloaded four iso images namely, 
5.2.1-RELEASE-alpha-bootonly.iso, 5.2.1-RELEASE-alpha-disc1.iso, 
5.2.1-RELEASE-alpha-disc2.iso and 5.2.1-RELEASE-alpha-miniinst.iso from 
mirror side.  Do I need to burn all these images?

Did any ever body install FreeBSD on that particular machine (AS 1000A 
4/266) or know about any known constraint?
Any related information would be much more appreciate!!!

Santanu