[plt-scheme] License question

I'd like to use PLT Scheme in a commercial application. I know that
PLT Scheme is licensed under the LGPL, so I should be able to link to
it without releasing my own source code (which I would prefer).
However, I know that (require)'d libraries are automatically
incorporated into the executable.

Is there a way to either
a) Have all libraries and collects be dynamically rather than
statically linked, which is completely legal under the LGPL, or
b) ...Some other way to release a proprietary commercial application using PLT?