CM 5.2 to Mid-Enterprise HA solution

[jimvicom]

I have a current customer on a S8500C/G450 with CM 5.2.1 and they are going to migrate to a Mid Enterprise Solution with High Availablity on CM 6.2.....

So what documentation do I use? Documentation I have found:

-There is upgrading to 6.2 but that does not include the Mid Enterprise Solution or an S8500C with 5.2
-There is upgrading the mid-enterprise solution from 6.1 to 6.2


So where is the document on migrating from 5.2 to mid enterprise?