Adding new columns in Purchaser approval list

Hi All,

I am working on SRM 5.0 . I want to add 2 new columns in the approval list screen.

Right now its have only 2 columns , Description and date.

I want to add 2 more columns to it- Supplier and total value. I dont want to add these information to the existing description column items.

Please let me know how can we change the layout of this.

Regards,

Nikhil