Add opportunities account on (activities) call listview

[Pdor]

Hi
I would to create a column on (activities) call listview that report the account name of a opportunities,
Actually, the call listview display the call name and the opportunities title that relate to. I want to append at the right of title opportunities the account name of same opprtunities.
See fig.1 for actual layout

I want to insert at the right of "test opportunities" the account name that relate to this opportunities.

I try to modify various file, specially /custom/modules/calls/metadata/call/listviewdefs, but nothing return good.

Thanks in advice.