Flash to Flex

My boss has asked me if I would like to take on converting a flash application to Flex, mainly because it runs slow. I do have a bit of AS2 experience but I’ve never used Flex. The application is the 3D kitchen planner at www.flexidiy.com.au.

I’m just looking for an idea of how difficult it is and how long it would take roughly. He’s asked me to do it after hours in my spare time.

Thanks,
Brendan.