Creating a fluid version of a skin !!
 

Currently i am using a skin from forummonkeys.com. The skin is only available in fixed version.

How can a manually make it as a fluid version ..

If they've used the standard vBulletin StyleVars, then just do:
Admin CP > Styles & Templates > Styles Manager > Next to the style, "Edit StyleVars" > Look for the "Main Table Width" one

What is the px size for a fluid style?

For a fluid style the width should be in percentage, e.g 80%

Thanks MaestroX. Where do I go to remove the cell line on board index?

I'm not sure what your referring to. Could you post a labeled picture to illustrate the problem?

here is the one. I want to remove the cells border on the board index only so there will be no box at all

Go to Styles & Templates -> Your Style -> Main CSS -> Table Border -> Remove everything in the "Background" field

Hope this helps

strange thing that I still see a thin white line there.