I am trying to project the present climatic condition to 4 carbon emission scenario listed as CCSM4 rcp2.6. rcp45,rcp60,rcp85. But the layers are geotiff format, which is not recognised by DIVA-GIS. I would like to know how can I convert these files to BIL, IDRISI raster or some other format recognizable by DIVA-GIS. When I used global mapper to convert these into BIL, it was successful but bil file has multiple bands and DIV-GIS recognizes only single band. I am totally confused how to proceed with SDM.