TntMPD's user guide has a great reference on this:
How to copy a TntMPD database to a new location
What follows is additional information and ideas:
If you know how to copy a file to another computer, you can easily transfer your TntMPD database to another computer. It's as easy as 1, 2, 3!
1. First of all, make sure that TntMPD is installed on the target computer. It's best to install the latest version from the TntMPD website.
2. Copy your TntMPD database file (it's a file that ends with .mpddb) to your other computer. (Where is my database file?) Here are a few ideas of how you can do this:
Use a service like Dropbox (www.dropbox.com). By the way, here's more info on how you might continue to use TntMPD with a service like Dropbox.
Email the file (as an attachment) to yourself. (Check with your ISP on size limits of your email.)
Copy the file onto a floppy disk (If the file is too large for a single disk, you can use WinZip to span the file across multiple floppies.)
Copy the file onto a Zip Drive, Jazz drive, CD-ROM, USB Drive, etc.
Copy the file onto a memory stick, compact flash memory card, etc.
Copy the file onto an external hard drive or a network drive.
Copy the file directly to another computer by establishing a peer-to-peer network two computers using Ethernet, USB or Parallel ports.
3. Once you've copied your database file onto the other computer, move it to a folder where you keep your normal documents (such as "My Documents"). Then just double-click on it, and it will open up in TntMPD! (HINT: If you copied the file from a CD-ROM, be sure to right-click on the file, click on "Properties" and turn off "Read Only".)