Well a test release means it's not yet hit gold and may be unstable. You should be fine though. Dunno any support recources for anything but gentoo, which is one reason I adore gentoo.
gentoo linux boot : boot partition for gentoo (holds the stuff necessary to boot gentoo, nothing more)
gentoo linux root (/) : root partition, ie. the whole filesystem
gentoo linux root (/root) : separate partition for user "root" (superuser) plugged into the filesystem at /root (ie. mount point)
gentoo linux swap: swap partition, virtual memory, pagesys it's called in win. assign a separate partition for swap is how we do in linux
lindows root: test partition for another distribution