There is actually at least one very straightforward way to install Ubuntu Netbook Remix without a USB key, without even downloading the image, over the network.
Just follow the instructions in
my previous article to get a working Ubuntu Installer over PXE. By default this installer will only setup a very minimal Ubuntu system, without any server or desktop packages.
At some point during the installation, you are offered the possibility to install additional software packages. At this stage you can just tick the box in front of "Ubuntu Network Remix" and that's it! You don't need to select any other package (eg Ubuntu Desktop) for a fully working UNR install. Personally I added "OpenSSH Server" because I want to be able to login remotely. Of course you could also add those packages later on.
