How to create a proper fs.zip ?

[Bastien]

Hi all,

I managed to create a customized image using build.py.

I have now os802_fr.img / os802_fr.crc / os802_fr.img.md5

I tried to put this on a key and to install it on a XO-1.

It fails, the XO is looking for fs.zip, then for a school mesh, 
etc.  I have no "OK" prompt and I cannot use copy-nand.

How do I create the requested fs.zip?

Thanks for your help,

-- 
 Bastien