Suggested settings for "Processor Scheduling" & "Memory Usage"

Deltek Vision is basically an accounting / Project management program running ontop of SQL Server 2005. What is the prefered settings for "Processor Scheduling" & "Memory Usage" for this type of system.

Right now I have this set to the same as my Exchange server, that is "Backgrouns Services" & "Programs" respectivly (which I found from an answer to another persons question in this forum).

Also: with 4 Gig of RAM, I did not think I needed the full 1.5 times for swap file, so I left the swap file a 3 Gb.

Thanks in advance!