wormold

Upgrade An Ibook G4 10.3.9 To 10.4.3/logic 7.2

Hi, I have got an ibook g4 with os x 10.3.9. I am looking to buy logic pro 7.2 but I don't think it will run on 10.3.9 is this true? If it is, how do I upgrade to 10.4.3, I looked on apple site and tried to upgrade to 10.4.3 but when I downloaded it it said I couldn't run it. Do I have to upgrade step by step i.e. 10.3.9 - 10.4 - 10.4.1 and so on. If I do manage to get 10.4.3 will my little lap top run pro 7 well enough. I've got 768 mb and 1.2 GHz thingy and a 160 gb external hard drive. As you may have guessed I am a computer idiot and do not understand anything beyond music software. Basically I need an idiots guide to getting my ibook as it is, to a state where I can run pro 7 without spending any or much money. Please help if I havn't confused you