Sharing kernel

Hello.

I am trying to share the SPIP kernel among many sites. It seems to be pretty easy and straightforward.

I followed the steps to the best of my knowledge, but it does not work properly.

When I access the directories for the specific site, it does rewrite to my kernel install. The mes_options.php file seems to work. The config and squelettes directories seem to be found properly. For example, the articles are there. My personalized header.html shows as it should.

But... css customization is not working and I can not access the Private site to write more articles, add sections, etc.

Site logo does not show either.

Please help !!!