These themes are designed to be consistent with the corresponding Greylooks GTK2/3 themes, so it's better to use them together.
Also, check my vim syntax highlighting plugin for Openbox themes, if you're interested in creating and modifying these themes.
The author of the themerc files is Victor Brand. Button assets are borrowed elsewhere, mostly from the BunsenLabs, and also from the Bear2 theme.
Just install the theme directories into your /usr/share/themes (for systemwide installation) or ~/.local/share/themes (for local install) directory.
This product is published under the terms of the GPL v. 2.0 license