Re: Old Celeron on MCE?
You should be able to, I believe MCE needs 2.4GHZ but you've got 2.6 so that would be fine. It wouldn't be as fast as a more high-end processor but it should work. I had MCE on mine when it had 512MB RAM and it did fine, should work with yours fine as well.
Desktop: Dell Dimension E510, 2.5GB RAM, Intel P4 3.0GHZ, 250GB HDD, Windows Vista Premium. Might not be the best, but the old girl is still running good.