Adjust user 5 - 8 width

hi,
please how can i adjust the width of at least one of the columns in the user 5 - 8 position so that it is wider than the others?

the way it appears now it just divides into equal parts but i want one side to be wider than the other.

Thanks

Example for user 6:

Place this at bottom of layout.css

#c1{
width:20%;
}

#c2{
width:40%;
}

#c3{
width:20%;
}

#c4{
width:20%;
}


so user5 has id #c1,user6 has id #c2 ...

Okay, thank you