At Tue, 06 May 2008 16:41:53 +0200, "Tim Hanson" wrote: > great, i will try that and would like to learn about modules. is this a good > place to read up on them: > http://www.htus.org/Book/Staging/how-to-use-modules/ > ? Yes. For anyone using v3.99 or later, this is a better starting place: http://docs.plt-scheme.org/guide/modules.html Matthew