RFQ spreadsheet customization

Hi,

One of the customer wants to customize the RFQ spreadsheet created after exporting it from Buyer workcenter using analyse by Spreadsheet option. They are always using Rich text XML option while exporting RFQ.

They need to add some more fields to it and remove some available fields.

As I know, it is generated using a java xmlworkbook classes and not having any BI template associated to it. Has someone addressed similar requirement to modify this spreadsheet or are there any known ways to do it?

Thanks

Rishi