Visual MP3 Splitter & Joiner supports Drag&Drop. In splitter mode, you can just drag the audio file you want to open from Windows Explorer to the program's window and then extract parts from this file.
In joiner mode, you can drag the parts you want to join either one by one or the whole bunch at once.
One of the main reasons I bought Visual MP3 Splitter was the Silent detection tool. It worked very well and was a great time saver when splitting several mp3 files containing whole CD's.
I must also mention that the team at ManiacTools was very helpful when I got in to some trouble with a file that had a garbled header. I don't how they did it but now I split that file too...Bertil Palmqvist, Sweden