[Mediawiki-l] Creating a new skin

[Charanpal Dhanjal]

I need to create a new skin but I having trouble figuring out to do this and  
get the skin to be recognised by MediaWiki. I understand that I need to 
create a new SkinXXX.php file in the include directory and also a new css 
file in the stylesheet directory. But, how can this new skin be registered in 
MediaWiki so that I can use it with the wgDefaultUserOptionsEn['skin'] 
variable in Language.php? 

I would greatly appreciate any help. 

Thanks in advance, 

Charanpal