Advice on charger circuit?

Hi!

I would like to power my latest project with 4 nimh batteries besides a power supply in case it gets disconnected from the outlet. My project needs at most 2A (lots of leds) and requieres 5V to operate. I want to have the batteries recharge whenever the power supply is connected and when it's not, they would power the circuit. I was thinking of using some charger ICs by maxim or ti or maybe adapting Automatic nimh battery charger circuit cutoff when full - EleeCircuit.com to work under these circumstances. Ideas?

That looks like a simple build on a RadioShack proto board. What ideas were you looking for ?
There's plenty of Nimh charger products available. What is it your are looking for with this post ?