quotes nightmare!

I am having trouble with my quotes in a function and think I have tried
every comb (obviously not) as it does not work:

I am trying to create a function within a function passing the second
function into the first as a parameter as follows:-

CREATE FUNCTION _test(text) RETURNS int AS '
BEGIN
EXECUTE ''
CREATE FUNCTION _test'' || $1 || '' () RETURNS int AS ''
BEGIN
RAISE EXCEPTION ''Help'';
RETURN 2;
END''; LANGUAGE ''plpgsql'' '';
RETURN 1;
END;'
LANGUAGE 'plpgsql';

SELECT _test('ing');

Could anyone tell me which bit is causing the problem as I am now completely
lost, the error message mentions is near LANGUAGE.

Many thanks

Graham.