R help - Sep 2012 - Forcing a reference category in logistic model

Hello all,

I am running a logistic model with a continuous variable as first
predictor and factor variable as the second. I would like to include
an interaction term in the following fashion:

    outcome ~ continous + factor + normalized(continuous):factor

My problem is that when I do so, the reference category is not the same as in

    outcome ~ continous * factor


Which makes comparison of the models difficult. I am sure there is a way to
force the reference category to be the same all the time, but can't seem to
find a straightforward answer.

Thanks in advance

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