Ok I searched for setting this domain mapping up and this is what I did:
all domains (A records) pointed to my ip adress
Imstalled mu wordpress as subdomain
installed domain mapping plugin
In DirectAdmin Domain Pointers as alias for all of domains
and also in the tools -> mapping domains all domains added
and hier is the problem:
when I whant to get any of this blogs (even main domain) it redirects to my main domain at /wp-admin/
And how to post on all of those domains how it works?
Do I need to make subdomain and then where to post for each domain
ok I reinstall all over and now I have other problem:
when I insert a domain at tools-> domain mapping
the first domain where the installation is made is overwrited with the inserted domain.
and every post of link is now with inserted domain, but with the content of the domain where the installation is!!!
So now What's wrong????
And how to seperate all those blogs
ok I solved...
mapping was good and work fine, but installation of mu as subdomain with dns wildcard and virtualhost....
so hier is the link for directadmin, how to do it easy way without to go on ssh.
http://www.nerdydork.com/setting-up-dns-wildcards-serveralias-in-directadmin.html