URGENT - Stage Configuration Question

Hello Gurus,

I have received a request from the business to update my workflow so that the aprover can not change anything(either role assignmnent or User details or validity) in the request for approval. He/she should just be alowed to approve or reject the request. The Workflow we are using is only for User Change and is a standard workflow. In my opinion I can achieve this by making the following changes at the stage level:

1. "Change Req Det " field as unchecked.

2. "Add Assignment" field as unchecked.

Would these teo things solve my purpose?Anything apart from this that i need to configure? Can you please suggest?

Would appreciate an early response.

Thanks.

sapgrc10