jai trouver sur internet comme le faire marcher mais jai de mal a traduire :
How do I install CursorXP themes?
CursorXP themes have . CurXPTheme extension. If you downloaded a theme with this extension, you can just double-click it from Explorer to load it. Alternatively you can manually add it to your themes: open the CursorXP configuration dialog, choose " Browse" as your cursor and it´ll open up a browse dialog. Look for files with . curxptheme on your drive.
If the theme you downloaded has a . zip extension instead of a . CurXPTheme extension you can extract it: if it contains . CurXPTheme, that´s the actual theme file. If it contains a . ini file and several other image files, it means that the . zip is a . CurXPTheme renamed. In this case, just rename the . zip to . CurXPTheme and finally load this file into CursorXP.