wLAN deployment suggestions?

Hey guys,

I’d like a bit of advice on setting up some RouterOS/IkarusOS nodes for a large deployment of a service for schools.
Basically we already have it all up and runnning with IkarusOS and WEP only encryption (static WDS configuration)… But we’d now like to add a Radius server in to do our authentication.
Since IkarusOS doesn’t yet support this in a WDS setup, can we do it in RouterOS? If so, how? The documentation/wiki isn’t enough help for me to get this working…
Any help is much appreciated.
Please see this picture for a layout of the current network. Please note that this is outlining our basic backhaul network. There are a lot of other nodes.