Lighting, Light Fixtures, Ceiling and Exhaust Fans - Replacing flourescent fixtures?

I have two extremely ugly 2-light flourescent fixtures in my 1970 house that I'd like to replace. (i.e. have my do-it-yourself challenged husband replace) One mounted on my kitchen ceiling - I'd like to replace it with a modern 4 light flourescent fixture if possible? And one mounted on my bathroom wall - ick - that I'd like to replace with a 3 light bar (NOT flourescent!). Are both of these "honey-do's" possible? If so - any tips or pointers would be much appreciated! Thanks.

Here are my tips: Read at least one book on home wiring before you start. Shut off the circuit breaker before doing anything. Don't rely on the wall switch to cut power. Carefully, and very precisely, record all connections before disconnecting anything. When you remove the mounting screws, be careful not to let the fixture fall and undo all the connections before you have a chance to record them. Take pictures if necessary. Label wires if necessary. Don't have too many preconceived notions of what you will find. Assume you might find anything. Also assume that what is there is correct, and that your job is to duplicate it. Don't necessarily disconnect everything. Only disconnect the minimum necessary to remove the old fixture. Read all the new fixture installation instructions. Preferably do this in the store before you buy it. That way, you'll know if there is anything about this fixture which will prevent you from being able to install it. Fixture manufacturers want you to buy it, so they don't put any information on the box that might lead you not to buy it. As you read the instructions, be aware that there is no way that the fixture manufacturer can cover all possible situations in their instructions. So that means that what they tell you to do may not actually apply to your situation. When there is a difference between the way the old fixture is wired and the way the instructions tell you to wire the new fixture, tend to trust what you see more than what you read. If you encounter anything that you don't fully understand, stop immediately and come here and post a question. Never guess!