Hello,
1. To remove the Footer credit, you have to enter any text in the Theme options > General > Footer Text area.
2. To get the custom theme skin, you have to edit / Create theme skin CSS file. We’ll show you the easy way. Edit the existing theme skin to get a custom skin. For example, Open the orange.css file and change the color orange to your custom color. After that choose the Orange theme skin in theme options. You will get your custom skin instead of orange skin.
To edit the skins, go to Theme Folder > CSS > Skins.
Hope you got this.
Thanks.