Looked around and found this online page:
http://homepage.mac.com/phrogz/CSV2vCard_2.html
This let me transfer my CSV to VCF (even on my restricted work computer) and using bluetooth "send" from my laptop the K750 was ready to accept and add the contacts!
I have to admit my forst effort had a lot of " I had to remove to make everything work, and being Norwegian I have contacts with "odd" letters, but after importing these were dead easy to edit away.
Felt good to finally have all contacts back, even phoned up a few I hadn't spoken to for some time