How to start the workflow manually

Hi,

1) i need to start a Workflow when The Manager decide to initiate termination for a particular employee. Is there any triggering event to do it or manually i need to create a programme in which i can write a function module to trigger it manually.

('SWE_EVENT_CREATE')

2) Tell me also whether i can do it using screen painter , where a push button can trigger this functionmodule and trigger the workflow.

3) Simply the initiator can start the workflow ?

Richard