First question is, you are obviously online, is that the computer that you are using to RIP your CD's as WMP has the option to automatically retrieve all the album info from the internet. (I think its from a site called Gracenotes). Would save a lot of time typing in all the required fields.
You may also want to consider using EAC for ripping your CDs. It also has the function to automatically tag your music while ripping.
Here is an excellent guide to
EAC configuration written by one of our members Dreamtactix291.
If you want to continue with WMP you should just be able to sync them with your player. There should also still be the option to find the album info and save it with WMP, if you are online.