Another option would be to upload the contact .csv file to an online email account (such as Outlook.com or Gmail) then sync the account to your device. Then, you wouldn't have to backup or maintain the list manually. Changes made on the device would sync back to the account.
What email service are you using? Chances are that it would accommodate your contacts.
I want to import into my Blackberry the contacts from my Thunderbird Mozilla Address Book, bit the latest BB software 7.1 does not allow this (previously I could do this with theASCII Importer/Exporter function bit now all that has gone. I found an CD for previous BB software but that doesn't seem to be able to find my blackberry.