Resource types

I actually had already viewed that post but it just wasn't working right.
I tried:
"/pix/f/"  and
"/theme/customtheme/pix/f/" and
"theme/customtheme/mod/questionnaire/"

but the trick in the end was that my icon was named "questionnaire.gif" and NOT "icon.gif" and placed in:
"theme/customtheme/mod/questionnaire/"

So in the end, the trusty Forums (and trial and error) make it all happen again! Thanks gang!