[Zope] PythonMethod problem

I know I am still using PythonMethods however I have not seen Python Scripts out yet for 2.2.4. Okay here is the problem. How do I call one PythonMethod from another PythonMethod? Example object foo is a python method and it takes a='',b='',c='',d='' does stuff returns a string foo_spec takes parameters a1='',b1='' it should return foo(a=a1,b=b1) However trying to call that foo gives an error. I get a NameError on foo when it is used in foo_spec. However using foo directly does work however I want to make easier customized interfaces for users. Thanks