you can get the freeware from the university of utah med student site. you can also download hundreds of "flash cards" from their site that are basically things taken directly from First Aid. it's a really nice way to study once you've been through FA already. the program keeps track of how well you do and tests you more frequently on the things you don't remember as well. supposedly you will memorize things 10-50X faster than regular flash card testing (according to their site).
the other nice thing about this software is that you can make up your own flash card databases and using a program called "filez" you can beam the databases to other users, so you and your friends can come up with more flash cards and all share.
there's a lot to sift through so if you're prepping for boards now it probably isn't worth it, but if you just finished first year this would be a great tool to use along with your classes and to keep the information continually fresh in your mind.
hope this is what you were looking for