Possible to migrate bool to int, converting values

Possible to migrate bool to int, converting values

I'm vaguely familiar with the concept of migrating schemes and data with
South, but now i'd like accomplish something a bit more advanced;
I have a model which holds a boolfield indicating status (active/not
active), and now I need to add additional possibilities using an
integerfield. The change itself is pretty straightforward using Souths
schememigration.
Problem is I need to convert the statuses in the existing objects (some
400+) to integers (0 for false and 1 for true).
Is this even possible, or do I need to find another way?