The manual of Move2Alf consists of three views, depending on what information you are looking for.
Looking on information how to install Move2Alf, then the Administrator Guide is the place to start. As an Alfresco user, you already have the 2 main ingredients at hand (your database and a webserver), so installing is just creating a database and deploying the Move2Alf web application.
Curious on how it works? The Developer Guide explains the inner workings and illustrates how easy it is to embed your business case.