Combine rice, contents of seasoning packet and water in cooking pan.
Bring to a vigorous boil. Reduce heat, cover and simmer until water is absorbed, about 5 minutes.
Add green onion and pimentos.
Combine vinegar, salad oil and sugar. Stir into rice mixture.
Chill before serving.
Measurements and timing are designed only for Uncle Ben's Fast Cooking Rice Pilaf, Original Rice Pilaf, Fast Cooking Spanish Rice, Long Grain & Wild Rice Blend, and CONVERTED Brand Rice