SCUMM: Add support for demos found on "Pajama Sam: World's Youngest Super Hero!"

[Enigma1st]

So, there's a demo disc called Pajama Sam: World's Youngest Super Hero!, although the name of the disc is Loews Demos. It's on internet archive.
There are 2 demos on this that ScummVM doesn't support.
One is "Preview" which is a sort of rolling demo kind of thing with a narrator talking about various games.
The other is "Music Sampler" which is the "song" folder on the disc and is a Putt-Putt Enters the Race theme song video that's not in the game.

When trying to add them, ScummVM has a couple options for each but none of them work and they just crash.

Preview gives options for Humongous Interactive Catalog and Voyage Presents Unknown Variant.
The catalog options crashes with "kgenunchanged used with unknown platform." The Voyage option crashes with:
"The game in 'preview\' seems to be an unknown game variant.

Matched game IDs for the director engine: vygrpresents-win

{"PREVIEW.EXE", 0, "t:b3befb844630e38e6066e63628800660", 123392},"

Song gives options for 3 different versions of the full version of Putt-Putt Saves the Race but all crash with "Local script 2050 is out of order"

The Pajama Sam 3 Demo on the disc works fine.

[tag2015]

The "preview.exe" file detected as a "Voyager Presents" variant is a false positive that should already be fixed in daily builds.

I can confirm that the demos don't work, so moving this to feature requests