Well,
though you have not metioned your version, I will try that..
First, start ACDSee open your destination folder in which you want to rename all files and select View any > Thumbnails or > List.
Press Ctrl + A or Click the last picture in the folder you want to rename, hold down the Shift key, and click the first picture; this will select them all.
Press F2 or Right-click the first photo, and select Rename from the drop-down menu. Now one new window open and ask rename the files. And you can also give number in order also.","
Hope this helps
