I tried this some month ago - and it doesn't work.
I did read forums for more than a week and didn't get it running - so no... it isn't possible atm.
Even if I set max alloc to 100% and do some other modifications it can't create the DAG.
Someone told me that there is a specific driver (which is some years old) which might be working... but that's all venture.
If I would get it running I would mine ETH for sure.. but it's just not possible with those cards.
https://bitcointalk.org/index.php?topic=1395481.new#new
Totally B U L L S H I T T !
At Time my 2GB Radeon Cards are farming with each 13 MH/s Ethereum ...
Come down..
I got to manage mine running ETH too now.
I have got 10,25 MH each card. So Got ~ 61,5 MH.