How does a person install memory in a Dell Dimension 3000 computer?

Assuming you have at least one free memory bus on your motherboard, all you have to do is buy a stick of memory that is compatible with your computer, and plug it in (Be sure to be free of any static electricity when handling any computer hardware!). To do this read your computers info pamphlet or if you don't have it any more look it up online with your exact computer model.

If you don't have a free memory bus then you can upgrade from your current memory stick size by removing the memory sticks and replacing them with new ones that are of higher value (EX: you have two sticks of 1gig ram replace with two sticks of 2gig ram)