about櫻蘭高校男公關部 OST

please help me to sovle these problems^^ thx!
1) inside the cd,there got a" Bonus Disc",inside it is sth "Pod Cast Radio" can anyone
tellme what's that ??and can anyone tell me what is the 內容 of them??
2) can anyone give me all the 歌名 of the both CDs? [前編 + 後編]
[ plx point out which song was sang by which character if can;]
3)can anyone provide the lyrics of some songs [ better with 拼音;] plx?

And that's all//thank you very much!!!!!