All most people really need is the 3.3-unzip-to-usb-stick.zip file, which you just extract to a USB stick. If you intend to compile software at a later date, also download devx_3.3.sfs. There's a bug in the wallpaper changer due to a last minute change in the default file manager; workaround is to open the image by clicking and then choosing "set as wallpaper" in the right-click menu.
The download links are dead, so they have been removed.
Maybe some day they will be active again.