If you are looking to use Genesis/Genesis 2 in Poser then you will need to install both the DAZ and Poser Companion files. However, this is where it gets tricky because different users have different methods of installation. Technically, you don't really need DAZStudio to port Genesis/Genesis2 into Poser, but if wouldn't hurt to learn another app in case you want to give Genesis 3 a go. This is my approach which seems to work for me. Load all your DAZ based files into the DAZStudio content folder (typically named My DAZ Library) and link this folder to Poser. Important step, don't neglect it. Next, create new external runtimes for your Genesis/Genesis 2 figures and content and also link to Poser; load all Poser Companion Files into those folders.