Take A Look at this post
http://forum.hostony.com/index.php?showtop...st=0entry3738follow those instructions only copy the appropriate files to public html rather than folder. Config.php is where you will tell the installation "which database, what user, etc.". I suggested you read that post because you might as well find and use latest version. read that post carefully and you will see all the information is there to accomplish this.
If all that seems too hard then just install from c-panel to folder; move all files to public root. I don't think you have to do anything in nuke for path, but if you do, it would most likely be a simple change in config.php. I've done this with sort of thing with oscommerce (with that you do have to change path in config.php). It's been a long time since I played with nuke but I don't think you have to do much else but move that files.