The HDMI and component connections on the HR2x output all resolutions (except component won’t output 1080P). The composite and S-video connections output *only* 480i. To answer the original question, yes, the box will automatically and always output a 480i signal on the composite and S-video connections.
Now, if the HR2x is set to output to a widescreen TV, it will also do this on the composite and S-video connections. This means that if you view it on a 4:3 TV, the image will appear to be horizontally “squeezed”. Of course if you use that composite or S-video connection on a 16:9 TV and use its “stretch” setting, then the image will look normal (although not “HDTV”). There is no way to change the output ratio to be different among the various outputsm. Still, I have found that watching 16:9 content squeezed to fit a 4:3 TV set is much less annoying that watching 4:3 content stretched to fill a 16:9 TV.