Can you please create some DDL links for these Raw files? Tipota are currently working on the subs and have release the ass. scripts for the first 24 episodes:
Episode 01-24 scripts
Groove Adventure Rave (DVD 720x480 x264 AAC)
Are you referring to the 7th OAD (episode 6)? If so there is no 720p release, unless its upscaled, as the source was DVD only and no Blu-Ray was ever released. So unfortunately we have to make do with the 480p releases.