awk .. question?

i have a little awk script that I use looks this:
awk '{if (FNR==1){print FILENAME; print $0}else print $0}' file1...file2....fi... > bundled.
i have completely forgotten how to unbundle this. I have tried several different approaches and still can not remember how to unbundle the file bundled. any suggestion welcome
thanx in advance moxxx68

This is going to result in a filename on a line by itself followed by all the lines in a file. This is repeated for each file given. I do not see a general way to unbundle such a thing. When you read a line, you can't tell if it's a filename or not. Sorry. but that's a terrible way to bundle stuff. You should use tar or something.

thanx...