Creating a Workflow: Where are all the fields?

[billo.cl]

When creating an action I have access to only a limited subset of the actual fields of the Module. For Instance, it is possible to modify the salutation of a related contact, when the target opportunity is saved, but not the account (account id of the contact) to which that contact is related. There are several other fields not present in the pulldown of the workflow management interface.
Am I missing something?

[jmertic]

If Workflow isn't meeting your needs, then you should look at writing Logic Hooks instead ( which are written in PHP ) that can do much more than the Workflows interface provides.