Modem speed may be helped by making sure you have correct and up to date drivers for it. Check you have all settings to ISP set-up correctly, also keep any extension leads to a minimum from the main phone socket, and as few connections in the lead as possible. j.
Is that Cybertweak program any good? I've just had a look at it on the page, and it all seems a bit vague. A responce from anybody in here would probably make my descision whether or not to use it a lot clearer.