Need help with a file. Htaccess

Advisory specialists htaccess! & Hello to all,

jai a little trouble...I can not understand the htaccess file and view multiple jai tutorial I understand it from all the options that apply in my case ..

jai accommodation [nomdedomaine1] where another site at this address [nomdedomaine1/anima/site /]

There is already a multidomain defined so that of they type this [nomdedomaine2] that points directly to [nomdedomaine1/anima/site /]

However, I would like of they types [nomdedomaine2], we do not see in lurl [nomdedomaine1/anima/site /]...but just [nomdedomaine2]

Could you write the maider. htaccess to rewrite lurl
And where do I put this. Htaccess? which directory?

Thank you for your help

I have no idea what you are saying, but maybe this will help ...

Tell us what you have.
Tell us exactly what you want to achieve.
Sit back, cross your fingers and wait to see if we can help