[dungeonguru]

When you do a New (Copy) of an SRD item it brings over all the attached scripts with it. If there's something hidden from the editor it will usually show up in the .user file you're saving as where you could look at it with a text editor.

In the case of the Rod of Lordly Might the hidden bit seems to be:

    <arrayval field="usrArray" index="0" value="Normal form (mace)"/>
    <arrayval field="usrArray" index="1" value="Button 1 (flame tongue)"/>
    <arrayval field="usrArray" index="2" value="Button 2 (battleaxe)"/>
    <arrayval field="usrArray" index="3" value="Button 3 (spear)"/>
    <arrayval field="usrArray" index="4" value="Button 4 (pole)"/>
    <arrayval field="usrArray" index="5" value="Button 5 (ram)"/>
    <arrayval field="usrArray" index="6" value="Button 6 (direction)"/>

What's showing up on the weapon tab is just the name of the item "Rod of Lordly Might" and the appended dropdown value -

i.e. if Button 2 is chosen it shows:
Rod of Lordly Might (Button 2 (battleaxe))

So, you could change your array values to simply be whatever text you want to see appended to the base item.

You can't change what the entire name shown on the weapons tab is completely though. You can manipulate what it might look like in a printout, but the livename is often used in the tab display and that cannot be touched.