NW10103250: Falcom jdk BAND Diva Kanako sings Vol.1 & 2 Karaoke Song Collection + How

[layzee]

To begin with, let's go through the whole "Diva Kanako" merchandise:

[NW10103210] Falcom jdk BAND Diva Kanako sings Vol.1
[NW10103220] Falcom jdk BAND Diva Kanako sings Vol.2
[NW10103230] Falcom jdk BAND Diva Kanako sings Vol.1 & 2 Karaoke
[NW10103240] Falcom jdk BAND Diva Kanako's How To Sing Falcom Songs DVD Video
[NW10103250] Falcom jdk BAND Diva Kanako sings Vol.1 & 2 Karaoke Song Collection + How To Sing Falcom Songs DVD Video Limited Set

3230 is a 2CD package of 3210 and 3220. Even though 3230 has an extra word in the album title (Karaoke), as far as I know, the CDs are identical with no extra tracks.

3250 is a limited set package of 3230 and 3240.

How are parent/child albums supposed to work again? I was thinking making the limited set the parent album (3250), and the music CDs the child (3230) and the DVD the other sibling (3240). Or is the DVD supposed to be separate (the DVD will of course need album info changes)? 3210 and 3220 can be left as is.