do the ftp install there have been some changes to the package manger that will cause some annoyances if you install from cd.
ftp will give you the latest stuff.
any troubles drop into the irc channel or forum.
btw it was not a challenge to install arch but since arch is well down the list and it is pretty darn nice i wonder what other distros are out there that people pass by because they are programmed to go to gentoo or other such ilk.