warble_fs2 is music and stu_fs2 is voice, so that ought to work regardless of them being in VP files. Are your VPs in the main directory or did you put them in the data folder? If you put them in data, move them out into the main game folder and try again, as the data folder is just for mods. For animations, you'd need tango2_fs2 and tango3_fs2, though I doubt you'll find any of them for download anywhere as they're HUGE. I'm surprised you even managed to find tango1_fs2 and smarty_fs2 anywhere though, so I suppose it's not out of the question. tango1 holds the act 1 command briefing anis and smary holds the techroom anis, so again those ought to work even from a VP.
Another thing I just thought of. You mentioned you've got files in the subdirs under data. The data directory, as mentioned, is for mods, and anything in that directory and it's subdirs overrides info from VP files. Since you've got files in those dirs, you could try to delete the ones for which you have the corrosponding VP files, and hope that'll fix it. So since you have sparky_fs2, clear out the effects, interface, models, fonts, hud, maps and sounds subdirs, since you have stu_fs2, nuke all files in voice, since you have warble_fs2, nuke the ones in sounds, and since you have smarty_fs2 get rid of everything in intelanims. But since you only have tango1_fs2, and no way to easily tell which anis you have and don't have, i'd leave everything to do with those (cbanims) alone till you get hold of tango2 and tango3.
[edit] Oh yeah, and back up the subdirs first in case something gets messed up doing this.
