Software to batch convert mono wav to stereo wav?

I have about a hundred 30 minute wav files that are one channel mono. When I use any CD burning software, it has to convert it to two channel stereo before burning. Is there a tool that I can use to batch convert all these files at once?

Also, once these files are converted, what software do you recommend for someone that has to burn a series of these 30 minute audio CDs on a regular basis? I kind of like the ImTOO Music CD Burner because it’s fairly simple and quick to use…