We have I have been modifying acad2010.lsp and acad2010doc.lsp for customization purposes for years and you are not supposed to. So I need to know how to restore the originals so I can then put my customization in acad.lsp and acaddoc.lsp. How do I do that? I just downloaded the latest service pack and I thought it would come with that. Do I pull out the original CD's?