[plt-scheme] Wrapping non-PLT code in modules

I have some code written for R5RS that I'd like to be able to wrap in a PLT
module, without modifying the original source.  Is that possible, and if so,
how do I do it?

I tried a few things (in v202) such as the following:

(module wrap-standard-code mzscheme
  (load "some-standard-scheme.scm") ; can't use require, not loading a
module
  (provide oogle boogle bargle))

...but all my attempts are met by the baleful glare of a person whose
appearance seems timed specifically to prevent me from doing what I want to
do!  (Happy Birthday, Matthias!)

Any suggestions?

Anton