i have this installer which works on my windows xp installation. when i tested it on my girlfriend's windows 2000 installation, the icons look messy (see attached screenshot).
kichik: i changed the bitmaps as suggested, but the problem still appears. i checked the windows 2000 version, the build is 5.00.2195 (service pack 1). hope this helps.
the problem was indeed a color issue (>8bit). the problem should no longer appear in future versions, since kichik added a check in the current version.