sk3pt1c

Hello, Trying to update a Magento CE 1.3.2.4 to 1.4. I've read multiple guides and have tried a few different ways but nothing happens. I'm trying it locally on my Mac with MAMP set up. I've installed a 1.4.2 and tried changing the local.xml to point to a copy of the online database but it crashes and i get a blank page. I've also tried installing a 1.4.2 and giving it the online db copy at install and it doesn't go past the db hookup screen. From what I've read, the database type changed from 1.3 to 1.4. I've also tried updating the database with Magento's database repair tool but to no avail. Any thoughts? What i basically want to do is have a brand new 1.8 installation with all the data from the old site. I don't care much if it looks off because we'll be theming it anew so that is of little concern, what's most important is to keep the products/media/clients/orders etc. Thanks for any help!!!