Applescript: Applying spot colors to existing paths...

OK, this is clearly a noob question, but i can't figure out the syntax... i want to apply particular spot colors to pre-existing compound paths... sounds simple enough, then why can't i find a post on this subject?.. here's a quick sample script...

tell application "Adobe Illustrator"
    make new document
    make new rectangle in document 1 with properties {bounds:{20, 20, 100, 100}}
    set the fill color of the result to {class:spot color info, tint:100, spot:"Spot4"}
end tell

I'm using CS3 if that makes a difference... thanks in advance for your help...