Bon, j'ai télechargé (et par la même occasion acheté) la dernière version d'Icon Mnager (1.4)
Features:

Added an Import from .BMP command in the icon editor, to import .BMP files from expansion cards into icons. Note to Zire 71 users: The Zire 71 HotSync converts .BMP images to .JPG, so you can either use a card reader/writer to copy the .BMP files directly onto the card, or you can rename the file to .IMBMP before installing them with HotSync.

Added a Brightness and Contrast command in the icon editor, where you can use a slider to adjust the brightness, contrast, or sharpness of the colors in the image.

The Renumber Icon IDs command lets you renumber icon IDs for the selected icons, or all icons in the set. You can also renumber them to the lowest available numbers, the highest available numbers, or starting at a specific number.

New icons are assigned the lowest available ID number, to help keep the icon numbers from getting too high for DateBk5.

Improved results when converting icons to monochrome, by automatically balancing the contrast level.
Fixes:

Fixed bug that accidentally discarded the changes to an icon set if saving it back to an expansion card failed.

Various cosmetic fixes.