Here are the opponents for the 1991 WLAF campaign:

EUROPEAN
Amsterdam
Home: Frankfurt, London, Paris, Baltimore, Toronto, Mexico City, San Antonio
Road: Frankfurt, London, Paris, NY/NJ, Orlando, Los Angeles, Sacramento

Frankfurt
Home: Amsterdam, London, Paris, NY/NJ, Orlando, Los Angeles, Sacramento
Road: Amsterdam, London, Paris, Baltimore, Toronto, Mexico City, San Antonio

London
Home: Amsterdam, Frankfurt, Paris, NY/NJ, Orlando, Los Angeles, Sacramento
Road: Amsterdam, Frankfurt, Paris, Baltimore, Toronto, Mexico City, San Antonio

Paris
Home: Amsterdam, Frankfurt, London, Baltimore, Toronto, Mexico City, San Antonio
Road: Amsterdam, Frankfurt, London, NY/NJ, Orlando, Los Angeles, Sacramento

NORTH AMERICAN EAST
Baltimore
Home: NY/NJ, Orlando, Toronto, Frankfurt, London, Mexico City, San Antonio
Road: NY/NJ, Orlando, Toronto, Amsterdam, Paris, Los Angeles, Sacramento

NY/NJ
Home: Baltimore, Orlando, Toronto, Amsterdam, Paris, Los Angeles, Sacramento
Road: Baltimore, Orlando, Toronto, Frankfurt, London, Mexico City, San Antonio

Orlando
Home: Baltimore, NY/NJ, Toronto, Amsterdam, Paris, Los Angeles, Sacramento
Road: Baltimore, NY/NJ, Toronto, Frankfurt, London, Mexico City, San Antonio

Toronto
Home: Baltimore, NY/NJ, Orlando, Frankfurt, London, Mexico City, San Antonio
Road: Baltimore, NY/NJ, Orlando, Amsterdam, Paris, Los Angeles, Sacramento

NORTH AMERICAN WEST
Los Angeles
Home: Mexico City, Sacramento, San Antonio, Amsterdam, Paris, Baltimore, Toronto
Road: Mexico City, Sacramento, San Antonio, Frankfurt, London, NY/NJ, Orlando

Mexico City
Home: Los Angeles, Sacramento, San Antonio, Frankfurt, London, NY/NJ, Orlando
Road: Los Angeles, Sacramento, San Antonio, Amsterdam, Paris, Baltimore, Toronto

Sacramento
Home: Los Angeles, Mexico City, San Antonio, Amsterdam, Paris, Baltimore, Toronto
Road: Los Angeles, Mexico City, San Antonio, Frankfurt, London, NY/NJ, Orlando

San Antonio
Home: Los Angeles, Mexico City, Sacramento, Frankfurt, London, NY/NJ, Orlando
Road: Los Angeles, Mexico City, Sacramento, Amsterdam, Paris, Baltimore, Toronto

I'm a little stuck trying to come up with a schedule that makes the most sense. I kinda want for the North American teams to be able to have a home game after those road trips to Europe and vice versa.