Create PSDs From Existing Forms

We are trying to port an existing application from its windows forms to other platforms and the need for a creative designer. You would be provided with mockup screens and your are expected to give the new designs. You shall deliver the source complete(Jpeg &PSD) and you must be willing to sign an NDA. The Fleelancer must be willing to dedicate good time for the project and we would only pay on milestones. If you are interested, please provide details of past experience.