How to dynamically bind the WorkItem Workflow

what I am trying to do is to dynamically bind workflow based on a value of the WorkItem field. Here is the example:
The normal WorkItem state changes flow: open->assigned->tested->securitychecked->deployed-resolved.

In case the Workitem is high priority which is defined by one of the workitem field, we want to bypass some of the state changes.

So, for example the emergency WorkItem state changes flow:
open->assigned->tested->deployed->resolved.

is there any programmatic or non-programmatic way to do this. Thanks in advance. -Eric