Way to override system jl files?

[Teika Kazura <teika lavabit com>]

Hi.

Is it possible to override, say, wm/windows.jl, installed system-wide,
by a local file ~/.sawfish/... ? It really facilitates test & debug.

I've put ~/.sawfish/lisp/sawfish/wm/windows.jl, but it isn't
loaded :(
Explicit (load "filename") doesn't override, either.

Thank you,
Teika (Teika kazura)