Why I gave exe - Actually to execute the script, everyone must have perl and some more perl modules installed in their machine. I thought providing exe will be easy for the people who dont know anything about perl.
Regarding Source - I will upload the script ASAP because right now I am working on proper naming convention so that it will be easy for other to understand the code. Anyway thanks for your comment :-)
My Download manager(esp for student) in Perl. http://tiny.cc/ntdfg
. Try it and provide your valuable feedback.