It looks like PyFits downloads are for Linux. Isn't there anything available for Win (xp)? -- W. eWatson (121.015 Deg. W, 39.262 Deg. N) GMT-8 hr std. time) Obz Site: 39° 15' 7" N, 121° 2' 32" W, 2700 feet Web Page: <www.speckledwithstars.net/>