Hello Paul,
Migration from LX2.0 to CMM 6.x is possible. Please refer to below document to get migration pre-requisites and other useful details-
http://support.avaya.com/css/P8/documents/100089565
You can find all configurations & deployment documents for CMM on CMM page below-
http://support.avaya.com/css/Product.../All_Documents
Hope it'd help.