You haven't given us much detail to work with, but I'll try to give you some information that might help.
You say this is a dvd containing pictures, and that it is not a commercially made movie. That helps considerably, because you don't have to worry about encryption.
Put the dvd in the optical drive of your computer. Next, go to Computer (or My Computer if you are using Windows XP). You should see the icons for the drives on your computer, including the dvd drive that has your disk in it. Right click on the icon of the dvd drive, and hit Open. This will show the contents of the disk.
If the disk has dvd-video in it, you should see two folders. One will be the Video_TS folder, the other is the Audio_TS folder. (sometimes, depending upon how a dvd-video is made, the Audio_TS folder is missing, but it doesn't matter too much since the Audio_TS folder is always empty).
To get it onto the hard drive you should right click on the Video_TS folder and click Copy. Then go to My Documents, make a new folder and make a name for it...then open this new folder and right click in this blank area and hit Paste. This will transfer the entire Video_TS folder into this new folder on your hard drive.
You can do this with the Audio_TS folder as well.
Now, if you opened the disk and did not find a Video_TS folder, you do not have dvd-video format on the disk. If there is something else in there let us know what it is.