[plt-scheme] backward compatibility?

> Are you using version-case from PLaneT?  It should handle this detail.
>
> http://planet.plt-scheme.org/display.ss?package=version-case.plt&owner=dyoo

Thank you for the link, I was not aware of your package. However, I need a 
solution that would work for PLT version >= 204. Since PLaneT support was 
introduced to PLT since version >= 207 IIAMN (and since PLaneT repositiory 
is probably no longer supported for versions < 299), one faces the same 
problem before being able to import your package with (require (planet ...))
Any ideas?

Dmitry