This can be done

by using Execute Process task all you need to do is

Put CMD.EXE on the executable

Put

/C type headerfile.txt datafile.txt footer.txt > Your final file.txt ( this appends the header file records..data file records and footer file records to the final file

put

your working directory where all these files will be at ....

where your header footer and data file is at ,

and finally

the results will be

Header file data

data file data

and then the

footer data ...