By default Poser 8 and Poser Pro 2010 put their main Runtime in your Documents folder (and with Poser 7+ you don't have to install the DAZ figures to the main Poser Runtime anyway). Choosing DS as the target application avoids the check for poser.exe with the base figures, which are still set up for Poser 6, but shouldn't otherwise make a difference (the ExP Addons look for the base figure's files, not poser.exe, and nothing else cares - barring upgrade products, of course). As BB says, another possibility is the missing dzInstall.ini fiel in c:Program Files (x86)Common FilesDAZ.