Cédric Lepiller's 'Asset Management' addon looks like a powerful tool. It'll store models and light setups and comes with a free set of screws and bolts :)
The Asset Management is available !!!!!
!!! Special Offer !!!
Only for 24 hours until Wednesday 10 am, Paris Hour , 10€ instead of 15€ !!!
That's a lot of exclamation marks ;-)