Installing 6.5.4 on 32-bit 2008 and 2003 Servers

You need to install 6.5 base software and then 6.5.4. Only x64 was released with new install media (CD Image NB_6.5.4.Winx64_CD.exe)
NB_6.5.4.winnt.x86.exe provides updates for NetBackup 6.5 on 32-bit Windows server and clients.

Where can I find NB_6.5.4.winnt.x86.exe it is not on my FileConnect page?

Release Update NB_6.5.4.winnt.x86.exe provides fixes to the Veritas NetBackup (tm) Enterprise Server / Server 6.5 on 32-bit Windows server and clients. It also contains fixes for NetBackup Add-on products and Database Agents. 
 http://support.veritas.com/docs/326385

List of links to the Veritas NetBackup (tm) Enterprise Server 6.5.4 Release Update downloads 
 http://support.veritas.com/docs/326270

Where are NetBackup 6.5 patch releases (release updates)? 
 http://support.veritas.com/docs/334222

This article contains information about upgrade requirements and the entire listing for all NetBackup Server, NetBackup Enterprise Server download lists available for 6.x and 6.x.x, including NetBackup Agents and Options. 
 http://support.veritas.com/docs/315276

As you can see, we're going to great lengths to keep you from having to navigate our Downloads page.  ;-)
 http://www.symantec.com/business/support/downloads.jsp?pid=15143

64bit has its own media refresh so you can use it as a "base" install.

32bit you have to use 6.5 as your "base" and then apply the 6.5.4 release update.

(This is pretty much exactly what Marianne already said above.)

Hope that makes sense!

That is what I needed.  I just didn't know if there was a difference between 64-bit 2008 and 64-bit 2003 and you are saying there is not.  Thanks.

CD Image NB_6.5.4.Winx64_CD.exe can also be used for W2003 x64.
Extract from http://seer.entsupport.symantec.com/docs/326270.htm :
CD Image NB_6.5.4.Winx64_CD.exe provides a media refresh to 6.5.4 for Veritas NetBackup (tm) servers and clients only on Windows 2008 and Windows 2008 Server Core x64 platforms, and for new installs on Windows 2003 x64 platforms

AARRGG.. where's the link to the download on these pages??!!
http://seer.entsupport.symantec.com/docs/326270.htm

click the one you want - opens new page with details - go all the way to the bottom - look for word "DOWNLOAD NOW" in big red letters - click on those words.