where i can find more skins for coppermine.....

[Fking]

well i tried few of the built-in ones, but i need something more attractive....
not just the colours changed, but some graphics layout added....

where i can find such?

[loudone]

click sourceforge.net/project/showfiles.php?group_id=89658, and scroll down.....

[Casper]

or look at the demo.  You can try out any of the themes submitted by users there.