CMS Made Simple Forums

Hi . I´m rather new here so I hope this is the place to ask a question about CMSMS MLE that I think is a realy great thing but its a little hard for a newbe like me to understand right away ..

I realy like the way that its possible to have www.mysite.com/se/ www.mysite.com/uk/ and so on but I cant seem to understand how I implement mle css files ?

on the static site that I´ve created I have
www.mysite.com/global/styles/base.css
www.mysite.com/global/styles/happy.css

and so on .. I think you get the general idea here ..

in some css I have background-images that are language specific ... meaning simple that I have background images .. lots of them that have the current language in them .. so what I need is so have multilangual css files like :

www.mysite.com/global/styles/base.css <- the base is the same for any language
www.mysite.com/se/global/styles/happy.css <- this css have swedish background-image /a_swedish_headlineimage.jpg

and in a outher language selection it could look like

www.mysite.com/uk/global/styles/happy.css <- this css have a english background-image /a_english_headlineimage.jpg ..

how is this done ?

best regards