Running multiple jobs

Good Afternoon,
I have several command files to run simultaneously. I need to run say a fixed number (5) command files to be executed and then when one job finished, command prompt would need to read from list and keep running 5 command files all the times until all the files are done.Can some one help me out with a script.for example I have the list.txt which has listed 30 bat files so the control has to go and read the first 5 *.bat files and run them and when one of them is done,then read the next batch file from the list.txt and run that.

Thanks.