Adding Computers to the Group & Installing Client

Hi All,

Is there a way of adding multiple computer to a group without installing client (I have over 300 Laptop and well over 500 desktop excluding servers), also how do you deploy client to this multple computers.

I created a group and added OU from AD which contains several computers, how do you deploy to these group.

I created another group and manually added 10 workstations which are all coming up as offline, how do i deploy client to this group

Please I need some direction and not link to doc, I have seen quite a lot of doc but just referring to ways and not specific

Thanks and rgds