Applescrpt illus cs4 - how to "rasterize" a selection of placed items

Question

Could use some help with applescript/ illustrator CS4.. .
I need to select all images on a page and apply the object > rasterize command.
so far i have
    set allGraphics to every placed item of document 1
but can't figure out the right command to rasterize (including setting certain options.)
any help is appreciated!
thanks

Answer 1

I did something similar using an action
--get a sourceFolder that holds the files to print
set sourceFolder to (choose folder with prompt "Choose a folder with files to process:") as text
-- get a list of files of the files to be printed in the sourceFolder
tell application "Finder" to set workingFiles to (every file of folder sourceFolder) as alias list
repeat with workingFile in workingFiles
    tell application "Adobe Illustrator"
        open workingFile
        tell current document
            set layerRef to (first layer whose name is "RED")
            set g to every page item of layerRef
            repeat with i from 1 to count of g
                set selected of item i of g to true
                do script "raster" from "Default Actions" without dialogs
                delay 1
            end repeat
        end tell
        close current document with saving
    end tell
end repeat