For this you need to Download a Software Called Cproxy.
You Can Download and
Now you need to register on Cproxy From here http://www.cproxy.com
Now you dont have to do anything:
Just Fill Up Your Registration Data as Shown and choose you server as Prague-CZ,UDP:9201
Now restart your Software.
Now Connect you PC using airtelgprs.com and start Cproxy . Wait till it gets connected And now You are Free To browse And Download.
IDM ( Internet Download Manager ) Configuration:
Go to proxy / socks
Tick on proxy
Proxy server address: 127.0.0.1
Mark http , https , ftp.
Now You Are Free to download Using IDM.
IMP: One Trail account will remain active for three days. And You can create one account with one email only.
Solution for this is to create account on hotmail and then use hotmail aliases to create 5 aliases.Now you have total of 6 addreses on one account . So 18 Days. Create Multiple Hotmail Accounts. And Enjoy :)