I'll add to what Dan said.
I always take my laptop with me to WDW to download pics.
As Dan said, you should get a memory card reader that hooks to your laptop via a USB cable. Once you attach the reader to the laptop, it should be recognized automatically. However, it may not depending on the brand of reader. Some require you to do a one-time driver software installed so the laptop operating system can access the reader. Once this is done, the reader will appear as additional driver letter. All you need to do then is create a new folder on the laptop and copy (drag-n-drop or cut-n-paste) the images from the memory card reader to the new folder.
Here's a tip that'll help you keep things organized.
Make a folder called "Disney 2004" then change to that folder.
In that folder, make a new folder for each day that you will be there such as "Monday 12-25-2004" or the park you were at that day "Magic Kingdom 12-25-2004".
This will make it much easier to organize the pics than dumping them all into one folder and sorting them later because you have to look at each picture to see where you were.
And I do it every night or the next morning then delete the images on the card. But before I delete them from the card, I do a quick check of each image (on the laptop) to see if they transferred correctly. Sometime a picture will get buggered up while transferring. If one is, just download that picture again and overwrite the bad one.
If you are using Windows XP, a viewer is included. Most of the time just double-clicking on the file will bring up the viewer.
If you're using something other than XP, there are plenty of free viewers available. One that I recommend is the one available from
www.irfanview.com download and installation is pretty easy.
Good luck and have fun!