Edit the Status field option list for Opportunities

Hi there,

I would like to edit the option list for the Status Reason field (statuscode). The current choices are:

- In Progress

- Deferred

- On Hold

The new options I want to create (except one that already exists - Deferred) are:

- Developing

- Deferred

- Advanced

- Foundation

- Lapsed

When I look at the field dependencies, there are 8 System Forms, 1 Process (Opportunity to Invoice (B2B)) and 1 Sdk Message Processing Step Image (PostImage).

Opportunity to Invoice (B2B) Process:

I can't find the PostImage in Sdk Messaging Processing Step

I'm not familiar with the Sdk Messaging Processing Step component, so I don't know the impact of creating and deleting options. 

If I decide to create a new Status field with a new option list, is it fine just to replace the old field in the forms and process, or there is something else I need to update?

If it's not clear enough, or if you need more info/details, please let me know.

Thanks for your help,

John B