I tore apart a couple of the recent update installers and it looks to me like they include all of the previously updated drivers too, so I think you can just go straight for the latest update.
I went straight to the latest mediator install and then the latest multimedia installer with no problem after a clean install on my A4000T. I've also done it for a friends machine. The MM-up! disk that comes with them is out of date from the start and no point in using it.