My fault should have read your question properly. No I dont think you can remove those entries in the Kmenu.
To remove the Trash bin, have a look under you home directory for a directory called 'Desktop'. You should be able to delete it there. Or you should be able to drag and drop it into another folder using konqueror.
If you can't remove them, can I at least disable their functionality somehow?
I was able to remove the "Start New Session" button by editing the /etc/opt/kde3/share/config/kdm/Xservers file so that it looks like this... :0 local /usr/X11R6/bin/X vt7 #:1 local reserve /usr/X11R6/bin/X :1 vt8 #:2 local reserve /usr/X11R6/bin/X :2 vt9 #:3 local reserve /usr/X11R6/bin/X :3 vt10 #:4 local reserve /usr/X11R6/bin/X :4 vt11 #:5 local reserve /usr/X11R6/bin/X :5 vt12 I'm still searching for a way to remove the "Lock Screen" button. Chris