replancing whole abap web dynpro screen with flex screen

Hi,

We are implementing SAP SRM 7.01 which is on Net Weaver 7.01. In SRM 7.01, all the business transactions and frontends are developed in ABAP web dynpro floor plan manager. My client don't like SAP delivered screen, so we are planning to replance sap delivered screen with either flex or java front end. After refering many threads and artical, I come to know that adobe flex development would be faster and can be easily integrate with web dynpro ABAP as compare to Java front end.

My questions:

1.Since SRM transaction business logic is in web dynpro ABAP, can we replace whole(not part of screen) web dynpro floor plan manager front end screen with Adobe flex screen without changing the business logice ?

2. Since web dynpro ABAP integrate with flex via sap flash island concept, Part of web dynpro display element can be replace with flex. Can I design the entry field part of a screen in flex and integrate with existing ABAp web dynpro ?

3. Do I need to think about SAP abobe flex integration concept like FLAS SAP gateway integration, BSP flex integration etc for replancing the whole screen ?

4. Do I need Adobe livecycle data service to replace whole transaction screen ?

Some alternative idea would be welcome.

Thanks in advance.

Regards,

Jennifer