Can my collections, located in CS6 Bridge, be imported / transferred into Lightroom 4?
Not directly. But if you apply a keyword that relates to the collection to all the images in the collection then import the images into Lightroom you can isolate using that keyword and create a collection in Lightroom.
Then you can delete the keyword from the images.
Thanks for the reply, I will try that as soon as my laptop is back from the repairers and will come back if any further issues. Dennis