I have these scripts on my little website http://sites.google.com/site/terencehill/Nexuiz
and now I want to share them with everyone in this forum (I don't know why I didn't it before).
See instructions inside the files to use them.
* http://sites.google.com/site/terencehill/Nexuiz/multicolor_crosshair.cfg
This script gives you a crosshair that change color continuously
* http://sites.google.com/site/terencehill/Nexuiz/multicolor_skin.cfg
This script gives you a skin that change color continuously
* http://sites.google.com/site/terencehill/Nexuiz/zoom.cfg
This is the AceOfThumbs' zoom script, that gives you 3 zoom levels, with an "add-on" I did to calculate precisely the sensitivities for zoom levels, so u don't have to calculate them for each zoom level.