Hi ivan, regarding your offtopic question, you could try this:
TYPE part*.txt >>complete.txt
Every part should end with a blank line (otherwise you would get the last line and the first line of the next file joined into one line).
If the parts are in alphanumeric order, this should suffice (and if complete.txt exists, you should delete it before, otherwise everything is appended again).
If they are not ordered, you could write a batch file (for the first redirect, you could then use ">" instead of ">>" to create a new complete.txt without trying to delete it first).
In a linux shell like dash on OS/2 you would use "cat" instead of "TYPE".
Greetings,
Sandra-Asja