Modify Name in Office 2007 Setup

[TwoJ]

I'm trying to find out if there is a way to modify the name of the Title for the entries in the Office 2007 setup

In a multiple Office 2007 disc i can get office enterprise, Professional, project, etc, however in the window 'Select a Microsoft Office product' I have listed 'Microsoft Office Enterprise 2007' and 'Microsoft Office Professional Plus 2007', and 'Microsoft Office Project Professional 2007'.

What i'd like to do is modify the listing so i could have 'Project Professional 2007 (VLK)' and 'Project Professional 2007 (Retail)'

From what i tried today, the setup.exe file organizes the menu after scanning all the setup.xml files in each folder, the problem i'm having is that there seem to be some kind of checking done on the XML file that any real modifications made result in a startup error;

Error: Xml Signature verification failed for setup metadata Type: InvalidMetadataFile

any guru's out there going to take a stab at this one?