Another Win 7 question...

I haven't seen the answer to this one on the Win 7 site...

I'm running XP Pro and so have to do a "clean" install if I go to Win 7. All I have read is that I should get an external HD to back up all my files so that I can bring them back in once the install is complete. Here is my question... I have always had 2 hard drives in my system... (drive C and drive D) I have always kept my most important files on the D drive and have never had a problem keeping them whenever I did a "clean" install of XP. If I were to upgrade to Win 7... could I keep and get back all my files if I did it the same way... get them off the D drive instead of having to get an external drive?

Bobby