categorical control variables in SEM using AMOS

I am trying to build a model in SEM, where 3 categorical demographic variables (education (4 levels), age (5 levels), and gender (2 levels)) should be included as control variables. I plan to use SPSS AMOS. However, upon reading some documentations of AMOS, it seems AMOS can handle categorical demographic variables in SEM if you dummy code these categorical variables. Is this the best way? If so, after dummy coding them, how do I test if the overall effect of a particular variable? In regression, you can use partial F test. Can you do the partial F tests in AMOS?