four-way repeated measures ancova

I want to perform an four-way repeated measures ANCOVA, but I'm not quite sure how. I want to analyze the following:
Four categorical independent variables: 2 dichotomous, 1 with 3 categories, 1 with 5 categories.
Two interval control variables.
One continuous dependent variable.
Interactions between the 4 independent variables.
Could anyone give advice on how to enter these into SPSS?
Help is very much appreciated!!!!!