After you make a change to the commands.def you must compile them to make them take affect after a reboot. This is not hard to do in fact its a single command.
home/mud/vme/etc $ makeThe make command will make any define file that has been modified into its .dat file which is in the VME lib directory. You should never change the '.dat' files. If you see a warning or error when using the make command you will need to fix them in the '.def' file that has the error. You may want to intentionally make a few errors so you can get used to what errors the make gives on each error..