So I finally took the plunge last W/E and upgraded FC2 to FC3, and sawfish has finally been removed.
I've never really found metacity does what I need, but now I'm used to GUI config. for straightforward options (e.g,. key/mouse bindings/ themes) I'm loathe to drop to another (more configurable) WM that / forces/ me to fiddle with config. files (did I really just say that?) like I used to a few years back in FVWM2.
I know of devilspie for metacity which will give me matched window config., but is there any way of properly customising key/mouse bindings with metacity (even via an external app. like devilspie)?
I share your love of Sawfish, but I've managed to locate most of what I needed in the way of congiguration under Preferences in the Gnome menus. I can't speak for mouse button-6, but Keyboard Shortcuts have their own popup there.