What would I miss, If I did developments with Primefaces 1.1

[Nightbeat]

I have almost developed the web part of my application with Eclipse and Apache Tomcat using JSF 2.0 - Facelets and Primefaces 2.1. But unfortunately, I have got to convert it to JSF 1.2 , because we have to develop EJB part with RAD 7.5 and Export the entire ear with RAD 7.5. RAD 7.5 doesn't support JSF 2.0, hence I will have to adopt Primefaces 1.1 to be used with JSF 1.2.

I need to know what would I lose, if I used JSF 1.2 with Primefaces1.1 . will primefaces for JSF 1.2 be supported with new components and improvements in the future as well?

Or else, please someone do tell me a way to use JSF 2.0 with RAD 7.5 and WAS 7.0, if you have done it successfully.

RAD 7.5 = IBM Rational Application Developer 7.5 ( the most horrible Nightmare I've ever struggled with )
WAS 7.0 = IBM Websphere Application Server 7.0

Please confirm whether Primefaces 1.1consists all the bug fixes and improvements that Primefaces 2.1 has. (New features which came with primefaces 2.1)

Thanks!!!