[Gretl-users] MacKinnon, Haug, and Michelis (1999) critical values

Hi there, I've got a question concering the MacKinnon, Haug, and Michelis (1999) critical values in VECMs. At University I (have to) work with EViews and after performing a Johansen Cointergrating Test including an I(0) exogenous variable. However, I wonder whether the test is biased towards finding a CI vector when including this variable. Hence I looked up in the object reference and found: "Note that the output for cointegration tests displays p-values for the rank test statistics.These p-values are computed using the response surface coefficients as estimated in MacKinnon, Haug, and Michelis (1999). The 0.05 critical values are also based on the response surface coefficients from MacKinnon-Haug-Michelis. Note: the reported critical values assume no exogenous variables other than an intercept and trend." Does anyone know, whether there exist critical values including an I(0) variable different from an intercept and trend?! Best Pindar