I call it simpletab because of the singe tab on the top. I dont like the "hr" for the leftblocks but I cant think of another way to seperate the two sections.
what png problem.... (ie 7 supports the alpha layer transparency)
you can use this
http://homepage.ntlworld.com/bobosola/
but for some reason the javascript screwes my computer up :( also if its set as a background that wont fix it. You may also want to know about the gamma levels in pngs.