Tonight I’ve upgraded my Apple TV from the regular 40GB harddisk to 160 GB harddisk. I found that on many sites the how-to’s are teribbly wrong or don’t work with Mac OSX 10.4 (Intel). Having the EFI and recovery partitions present on your new disk, makes diskutility screw up the whole harddrive so you can start all over again.

Additionally, there’s no need to copy the OSBoot and Media partitions, since they can be reconstructed, so safe a lot of time and don’t copy those!

Next will be hacking the thing, which should be relatively easy after this ordeal.