It is a lengthy process but I could only think of this way.You could export Pictures as DNG from Lightroom 5 to a thumb drive/File sharing system(like dropbox) then use the HDR feature to merge images.Then export the final image back to the thumb drive or Share it via any file sharing System.Then import those Files back in Lightroom 5 and edit them.
First, thank you for your quick response. I’ll give this a shot. Would I have to export as DNG or can I export to the flash drive as a RAW?
Lightroom can only export as DNG(closest to what raw files have)
OK, thank you.