Making a boot disc, must I be administrator?

Hi Everyone,
When I make a bootable data cd as administrator it gives me the option, in a drop down list, to specify where to get the boot files, I select A: and it works okay.
If I am a normal user the drop down list is empty and I cannot proceed. Is this deliberate or a bug.
Note I have the burn rights program installed and ‘everyone’ has burn rights.

Any help would be much appreciated.

kind regards