These song conversions are so good. I love the port of Divine Battle at 5:49. Although I think my favorite is still BT Ultimate during the fight with Chaos Ruler.
im currently playing through them so what do you want explained? basically theres two "Main" hacks. this one aabeta which changes loads of system things like how magic is learned and what tech types there are and introduces things like combo levels and events from saga frontier 1/2 romancing saga 1/2/minstrels song & unlimited saga then theres the bokuno hack that mainly focuses on story expansion so they expand or change a majority of the existing quests+the bonus quests. has slightly different characters able to be recruited than the aabeta patch but most of the gameplay changes aren't present but its different. they're both quite good for their own merits. tbh I might prefer aabeta cause the mystics were overpowered to me and you could have a full team of them XD. (I used Asellus/White Rose/Dr Nusakan/Princess Rei/& Golden Lion)