[Sannitary]

Possible? It would be great for a change, some examples:

http://images.wikia.com/gtawiki/imag...eta_ballas.jpg
http://images.wikia.com/gtawiki/imag...etaBallas1.png
http://images.wikia.com/gtawiki/imag...etaBallas2.png
http://images.wikia.com/gtawiki/imag...etaBallas3.png
http://images.wikia.com/gtawiki/imag...ear2-GTASA.png
http://gta.wikia.com/File:GSF_Member_7.jpg
csbigbear2
http://images.wikia.com/gtawiki/imag...A_Member_4.JPG
http://images.wikia.com/gtawiki/images/2/25/Gtasa34.jpg
http://images.wikia.com/gtawiki/imag...ecas-GTASA.jpg
http://media.gtanet.com/gtagarage/files/image_12726.jpg
/imageshack/img27/8411/betacop.jpg
http://images.wikia.com/gtawiki/imag...GTASA-Beta.jpg

AND THIS: /imageshack/img593/3323/1stmv.png

Basically all those skins should be in the game files, I think...

[Diablosrouge]

You can only get those skins by modding the current ones, so no.
Also, cutscene-only skins cannot be spawned because they crash the game due to their properties being different than normal skins.