repotting a very unhappy phal

[deathofregret]

hi guys, i'm back with another newbie question!

i have a phal that's very unhappy - i think there are definite signs of root rot, to begin with. it had several new blooms and the beginning of a new bud, but all have wilted within the last couple of days. the stem has turned a dark purple color, but i've got two live leaves, slightly cracked, and some live roots, i think. (i've attached photos for everyone.)

i figure that since the leaves are alive, i can attempt to save the plant. i know it needs to be repotted, but i don't know what the best medium for a phal is, and i can't seem to find a conclusive answer. i know i need to trim the roots, but should i also trim the stalk? should i repot in something bigger?

finally, does anyone have any suggestion on books about orchid care? sometimes the internet isn't the most conclusive source of information out there.

as always, thanks!

heather