Download accelerators are generally an extremely bad idea. On a dialup connection they will make no difference, any server will easily flood your 7kb/s maximum download speed (if they can't for some reason, additional connections are very unlikely to make any difference).
Download accelerators basically abuse the server that you're downloading from, if it's a free server (as most are) it's pretty rude to the server operator who is providing the service for free. And if it's a paid service, chances are it's against the terms of service you agreed to.
- proton