CHRM Workflow customization Queries

Hi Experts,

We have requirement in which we want to integrate custom AME approval process in AMS Marketing Process.

I have downloaded AMSAPRV.wft  file in order to customize and add new Process (Copy of AMS Marketing Process) and add required custom functions.

My query is how and where to setup the custom process in the Trade Management administrator so that when I request for Offer Approval, instead of standard workflow process, it should pick up the custom process.

Please guide me as I am new for CHRM modules.

Thanks in advance,

Kaveri