You don't mention what version.....
for 2007,
How to do this is explained here:
http://office.microsoft.com/en-us/access/HA102825091033.aspx?pid=CH100621911033
For cut + edit + paste, your macro look like:
Macro Name Action Command
Cut RunCommand Cut
Copy RunCommand Copy
Paste RunCommand Paste
Simply Save the above macro as MyMenu
Then create a macoro that calls the above
eg:
Action Menu Name Menu Macro name Status Bar text
AddMenu MyRightClick MyMenu My Edit
save the above as mEdit
Then, in the forms property sheet, simply set the shortcut menu as mEdit
the above works for 2003 also.