Acrobat Pro X save as ps

After merging several pdf-files to one the file-size seems to be to large.
Solution to this is to write the file to postscript and generate a new pdf with Acrobat Distiller.

This all should be done in applescript with Acrobat Pro X.
Is there a scripting guide or DOM for this application on the net available?

I can’t seem to get the save to postscript working.

So far I tried

1	set myPSsettings to {postScript level:2, binary:false, embedded fonts:true, TrueType:true}
	save front document to file newFile as PostScript Conversion using myPSsettings


2	save front document to file newFile using conversion "com.adobe.acrobat.ps"

Anyone any ideas???

TIA Erwin