Start out by logging into your facebook account. If you do not already have a facebook account, you can create one at www.facebook.com. Once you are logged into your account, click on the profile tab at the top of your facebook page.
This will bring you to a page that shows all of your profile information and all of your recent updates. Click on the tab at the top of the screen that says Photos, next to Wall and Info. This will bring you to a page that shows all of your facebook photos.
Click on the album that you would like to add pictures to or click the button that says Create a New Album. Once you have chosen the album that you would like to add pictures to, click the button that says Add more Photos.
This will take you to a new page where you will be able to upload photos to your facebook account. Search through your files and choose all of the pictures that you would like to upload to that particular ablum on your facebook account.
Once you have selected all of the pictures, click the button that says Upload. The pictures that you have selected will now be viewable on your facebook account under the album that you have selected.
You can go to the album and tag your friends in photos that you have uploaded to your facebook account if you like. Your friends will be notified that they have been tagged in your photo once you are finished.