Ah, thank you much. The CD release really skimps on the earliest games in the series (1 and 2 both have a measly 2 tracks present, 3 only has 8).
Unfortunately, the liner notes are a lesson in being ambiguous. All of disc 2 (including the Power Pro 3 tracks) is credited to what looks to essentially be "Powerful Pro Baseball Tracks". There's an asterisk there, but no follow-up to actual names.
Even Amazingu's translation of the liner notes doesn't exactly shed light on the earlier games, despite being a great read:
http://chudahs-corner.com/liners/index. … OLA-010~11
On another note, I'm disappointed there wasn't another Music Stadium release for this year. There hasn't been any shortage of actual Power Pro games coming out, so hopefully, it's just a year-long hiatus. Of course, I'm probably the only one outside of Japan who has all three...