Join to project as writer of documentation

Hi,
i am using FCK for 6 months, i used only base properties.Month ago i need extend functionality see my previous post development of plugin-cleaning HTML- problems .I didn't find documentattion explaining API.Than i make decision to write documentation myself.But if i write docs is better to share it.That is my reason to join to project.
Information abou me:
i am 34 year old programmer wit 6 years exp in php. I have some other activity in linux world .i am head of team preparing linux confernce in czech republic http://www.linuxchange.org site only in czech. Thanks for FCK, but with documentaion is better integrated and extendend. Best Regards