[Plugin: Custom Content Type Manager] css

Hi,

I have tried to customize a little of custom fields in the post administration for the user: group some boxes, float some custom fields to reduce all the empty spaces, etc..

I red carefully the tuto about the files (elements and wrappers), but it is not easy for me… where exactly should I insert some css? “what is the wp manager”?

http://wordpress.org/extend/plugins/custom-content-type-manager/