those are core IG libraries listed to support controls.. :

infragistics.core.js

infragistics.dv.js

infragistics.lob.js

What are the other js files ( functions) that are in the modules folder such as 

infragistics.ui.grid.cellmerging.js

infragistics.ui.treegrid.filtering.js 

etc... lots of them.. how they are used and where some documentation regarding them

Thanks