The only way I found to do this was to create a multi-level group/dimension on the cube which contains the static attributes that I would like displayed, and then I click Show/Hide Group levels on the crosstab and tick each attribute from which I want a column generated. So if I have 10 columns/attributes, then I need to create a group/dimension which is 10 levels deep.
I'm wondering if there is a better way to solve this kind of problem?