An update on my progress .Haven't actually got to installing reality 3 yet . installed the service pak 3 .1 for Poser and I lost my runtime ( my runtime is on an external hard drive ) Poser wasn't recognising it .So I had to uninstall Poser Pro and reinstall it. Had a few problems there but its all working now .I have to check on the cpu not gpu .I am running a Geforce GTX  560 graphics card .Once I have done this will check on the next criteria to run Reality3 .I'll keep you posted when I actually get to installing Luxrender and reality  HOPEFULLY I won't have any problems .Just remember I'm not a computer programer  ,and my knowledge is limited .But I'm sure that there are people here who have the time and patience to help me get luxrender and reality 3 set up and running .Thanks for your patience and understanding .