Working jpg AND nef files - help please

Question

I've got zillions (okay tens of thousands) of jpg files. I just got Lightroom today and I just started shooting nef+jpgfine with my D300 two weeks ago. Before then it was no RAW at all for me.
I'm trying to figure out how to approach my workflow for the future. I still suspect that, when I shot school functions, taking hundreds of photos, 90+% of the jpgs straight out of the camera will be perfect as is. For some small percentage of shots I will want to change them, so I can tweak the raw (or the jpg) files in the future.
1. If I have a folder with just jpgs, LR is happy to import those. But I have a folder with both jpgs and nefs in them, LR only allows me to import the nefs. First question: How do I do this, i.e. import both types into LR?
2. Here is my most basic (and my second) question, assuming I want to continue shooting BOTH raw and jpg, which I do, how do I use LR to manage the files?
3. For example, the first thing I want to do is to delete unwanted photos, which will have files of both types in the folder. How do I go about this using LR and without exiting to the Windows file manager to manually delete the jpgs?

Answer 1

>First question: How do I do this, i.e. import both types into LR?
On Import Tab of Preferences window, check "Treat JPEG files next to raw files as separate photos".
>.... how do I use LR to manage the files?
In grid view, you can get Lightroom to display filename and type on the frame around each photo in Grid view. Use CTRL+J or View->View Options to choose what you display.
Generally, the grid view will show .jpg and .nef versions of file next to each other, so when you want to delete a particular photo it is easy to select both the .jpg and .nef versions.
You could also do a Find with Text: Filename, Rule: Ends With, .JPG (or .NEF) in the search box to find all your .jpg (or .nef) files and work only with the .jpg or .nef files.
>the first thing I want to do is to delete unwanted photos, which will have files of both types in the folder. How do I go about this using LR and without...
Select them in grid view and delete. (but you should display filename and file type on the grid frame to make selection easier). Choose Delete from Disk on pop-up window if you want them removed from catalog and sent to recycle/trash.
I am sure that others will offer other suggestions, but all that you want to do can be done in Lightroom.