Default [Q] Zenithink c93 / c97 rom that works with chromecast

Hi I am trying to install the chromecast app on my Zenithink tablet. I believe it is C93 / C97.
The chromecast app says that it is not compatible with my device which is running 4.1.1 I think chromecast needs 2.1 so clearly should work.

Is there a custom rom that I could install to over come this or does anyone know of a workaround.

Thanks in advance. I am a real newbie at this so the easiest way is preferable.

Cheers
Beags