the program FreeHerp is an old program hard to find, you will have to find some one who still has a copy of it and get them to send it to you.
I have it some place on a disc, might take me a day or two to find it but if you like I can see if I can find it.
I'm not sure what OS you are working with on your computer but it will run with up to windows XP not sure about anything above that though.
There is also one that you can find a free version of by Degei that is a little more advanced then FreeHerp you might like to try here's a link for it
http://www.eyehit.com/degei/download.htm