you'll need CD-copying software (which should have come with your new drive). Nero and Roxio both make good copying software.

The copying software should have a wizard that walks you through the process.

If you don't have a second CD drive to act as the source drive, you'll have to put the original CD in the CDRW drive and start the copy. The software will make a copy of the CD on your hard drive. When it's done, it will tell you to insert a blank CDR or CDRW disk. You then tell it to continue, and it will write the CD data from the hard drive to the new disk and voila you're done!

If you don't have CD copying software, you'll need to buy a copy to make this as painless as possible.