How to grill pork ribs?

my mommy usually makes food but she got mad at us today and went straight to work :P we got 7 lbs. of spare ribs and a propane grill. any suggestions on ingredients? we got the basic stuff: salt, pepper, garlic salt, seasoning salt, lemon pepper, oregano, bottle of BBQ,....garlic/onion....i think thats it...maybe other little things