Maximum PC

As the title says, I want to convert .jpeg images to .alb for my portable media player. It does it automatically if I sync with WMP, but it seems when WMP syncs playlists, it leaves things out like album icons that are attached to the .mp3 and makes some songs skip. So I am creating my own playlists and I need to convert the album icons to .alb cuz the portable player won't recognize .jpeg in the album icon folder.
If it requires a program I'd much rather have a freeware program or an open source. And not a trial one. Or if there's a trick anyone knows in Win7 x64 Pro. I haven't found it yet. Thank you.

Have you tried simply renaming them to .alb?

You might get some better help if you tell everyone what program it's supposed to use.