GIMP :: Procedure Overloading In Scheme / Script-fu

I assumed from the scheme manual that procedure-overloading (in the form of different numbers of arguments) was permitted,since, for example, there are two versions of string->number.However, I can't seem to get it to work.Anything special one needs to do to overload?

If you take the following code and run it in the script-fu console, it works;but replacing all occurrances of "foo2" with "foo" gets into an infinite loop (I guess; it never returns, in any case).Is this just a user-error mistake,or is there something different needed to overload a procedure definition?I realize the two arg definition had to appear before the one arg definitionwhich used it; if the order is wrong I get the wrong # args error,which makes sense.

(define (foo2 arg1 arg2) (string-append arg1 arg2))
(define (foo arg1) (foo2 arg1 "def"))(foo "abc")
foo2foo"abcdef"