vowel descriptions

I need a little help - How do i describe the following vowels
(front/central/back, high/mid/low), and what are their ASCII IPA
representations?

r (in her, sure)
w (in put, book *or* cut, what)
u (in luke, toot)
o (in go, rote)
a (in dot, faught; open 'a')
e (in set, fetch)
i (in keep, me)

--
-Time is what keeps everything from happening at once.

-Garrett Jones aka Alkaline
Rising Sun - C&C2: Tiberian Sun - http://www.cnc2.com/
Malat - http://www.metro.net/3jones/malat/