Didn't get any response to my query about migrating the ACAD.PAT file so trying again: How do I go about adding more hatch patterns to AutoCAD 2005 ? I tried simply replacing the stock acad.pat file that came with ACAD 2005 with the acad.pat file from my old ACAD2000 which had about 10x more patterns) but when I run the program, it doesn't give me the additional patterns in the dialogue box. What's the secret? (And why did AutoDesk make it so difficult to do ?) Thanks in advance for taking the time to help.