ok i tried over 5 plugins and 24hrs + searching but cant find anything working.
First one i tried is http://wordpress.org/extend/plugins/wpnamedusers/
even if i added stuff but didnt work, as my test account wasnt able to edit the pages that were assigned to.
Second one was http://wordpress.org/extend/plugins/wp-sentry/
same as the first plugin as user wasnt able to edit the assigned pages.
These two plugins had extreme load on sever too.
Thired one was memory hugry plugin too. called User Access Manager http://wordpress.org/extend/plugins/user-access-manager/
same problem as above plugins, werent able to edit assigned pages.
the last one was my favourite, very light of server, but it is an old plugin, the developer dropped support for it and i am not a coder to fix it. it is:
please not that i DID EXATLY AS THE PlUGIN INSTRUCTOR SAID and still didnt work. if you have any other plugin then please post. i hope the last one can be forked or fixed by someone for wp 2.7