Replace standard shortcut menu with custom menu

Hi all
I have created a sub to add new controls to the "Cell" shortcut menu. Can I remove the standard "Cell" shortcut menu controls? if so how do you do it?

Please Login or Register  to view this content.

Thank you very much it works very well.

Is there a way to set the position of the pop up menu relative to the active cell? to minimise the mouse movement required. as default the 1st control is at the level of the cursor, I would like the cursor to be midway down the menu.

Thank you much appreciated!