How can i get files from my Vista OS Drive to my other drive with Windows 7? -

I installed Windows 7 on my Data drive with vista on my other Drive, when i got into windows 7 in my computer the drive with vista isn t there, is there a way to have the drive up so i can transfer files or is it imposable and i should just upgrade vista?

right-click on MY COMPUTER...select MANAGE..select DISK MANAGEMENT...right-click on d vista partition....select CHANGE DRIVE LETTER...click ADD... select a drive letter of ur choice... thn OK-gt;OK... that s all