Where are all my current Php Nuke Blocks located?
All of your existing blocks are located in your blocks folder just below your nuke root. So if your nuke root directory is public_html then the path to blocks folder is public_html/blocks. This is standard for every distribution or fork of nuke I have ever seen. When you create a new block it should be placed in your blocks folder or else you will not be able to add it via the nuke admin panel.