Hello,
The only official supported method is Fedora 14 Full DVD. However, some have installed it via USB using the DVD image.
http://wiki.amahi.org/index.php/Fedora_14_usb_install
As for using Live CD or Network CD, these methods have not been tested with this version. In Fedora 12, neither worked without quite a bit of manual work. Then some things were still broken.
So if anyone wants to try an install via Live CD and/or Network CD, we ask that you please document your steps in detail. If these methods can be proven to work the same as the DVD install, we can add the guidance to the wiki.