Change iDisk folder icons (not iDisk icon)

Hi,

I am trying to change the icons of certain folders within my iDisk. I am not trying to change the actual iDisk icon.

I can get it to work for one machine (by copying the icon in the get-info panel of the target folder) but I have yet to find a way to set it up so that the icon appears on the other machines in sync with the iDisk.

Thanks.