Customer portal show our status instead of postponed

Hi

We have a number of different case status types, like Work in Progress, Waiting on Customer, Waiting on External partner etc. 

These are all of type "Postponed" so that they reopen the case after a period.

The problem is that when the customer log into the customer portal he sees the status as "Postponed" while this is not the thruth.

How can we change the naming of whats shown in the customer portal for these types that are not real "postponed"

Thank you in advance

/Ole