I have never designed for IE6, and I never will. I have actually joined the IE6NoMore.com movement (I even made a MyBB plugin for it).
lol also even 512 is still behind the times. Mine has 4GB. Ram is not expensive as it used to be. Look you can buy a GB for about 20 bucks.
(This is where I buy my parts) But it doesnt surprise me. schools have very low budgets. They can't even give pencils out anymore..
I know from my own expiriance, it's a nightmare to make a perfect design for FF and also for all IE versions.. because I had this problem and I didn't have all IEs installed on my computer, I found this greate IE emulator, that shows you how your sites look in IE 5.5, 6.0, 7.0, and 8.0 beta..
I was quite proud of one of my website designs, until I saw it on a Mac with Internet Explorer 5.5...
Nop, not at all. From the very beginning I always test my site at least in three major browsers and all of them must be updated. I design and test in IE, Opera, and Firefox. Now I also test in Google Chrome.
Has IE6 Finally Reached the End of the Line? - CSS3 . Info