Please excuse me if there is any oversight on my part regarding this configuration. I first launched ImgBurn with the portable and no settings switches which worked great, but every time the program is run thereafter, it produces an entry in the registry under HKCU\Software (OS is Vista Home Premium SP1). Granted it is not a showstopper, but it would be nice to have as clean of a registry as possible.
Thanks in advance to anyone willing to tackle this issue and especially to Lightning for this amazing program. There should be a Nobel prize or something like that for this.