If it's mutual funds you can select "RIC" as the country name (stands for Regulated Investment Company, I think). Form 1116 instructions:

You don't need to report income
passed through from a mutual
fund or other regulated
investment company (RIC) on a
country-by-country basis. Total all
income, in the applicable category,
passed through from the mutual fund or
other RIC and enter the total in a single
column in Part I. Enter “RIC” on line i.