DVDs, VIDEO_TS & Toast 6

[Randy Clark]

Using DVDBackup, I made a duplicate of one of my commercial DVDs to 
send with my kids while they're away at their grandparents. No, I don't 
trust them to take care of the original   ;^) and I may want to watch 
the video while they're away.  I checked & it appears I'm within my 
Fair Use rights.

Anyway, I have a VIDEO_TS folder full of .VOB, .IFO and .BUP files 
totalling over 8.5GB.  I assume this folder contains the movie along 
with the menus, special features etc. on the DVD.  Anyone know of a way 
to burn this to a standard 4.7GB DVD-R?  When I dragged the VIDEO_TS 
folder to Toast 6.05 (using the DVD settings on the Video tab), I got a 
message about some of the files being unsupported and wouldn't be 
included.

  I'm wondering:
  (a) why some of these files wouldn't be supported trying to burn to 
DVD under Toast?
(b) if I could get them to work, would Toast 6.05 be able to encode the 
material to fit onto a 4.7GB disc?

No great loss if I can't get it to work, but it would be nice for 
future situations to figure out some way to compress the oversize files 
to fit on my blanks. Getting the special features & menus would be 
nice, too.