I recently photographed a family event with my Canon 5D Mark II using RAW and JPEG Large. When I imported into LR 4 I expected to see the RAW photos and JPEG photos in the library. The RAW files imported fine but the JPEG photos did not import at all.
Can anyone help me sort this out,
In your Lightroom options, you need to check "treat JPEG images next to raw images as separate files" (or something close to that). If you don't have that option selected then Lightroom will only display the raw images.
But be aware that changing that setting is not retro-active, so those Jpegs that didn't import won't suddently appear. You'll need to either run the import again, or maybe a tad quicker would be to synchronise the folder.