I shrunk LBP2 down to 2.5GB and its still got files I can remove to make it even smaller. I deleted the tutorials, and all references to any other language than English and it works fine. I know I cant do the tutorials unless I now put in the disc but how many times are you going to do them?
Same as LBP1. There is a 4GB Japanese language pack in my AU version which I deleted down to 4GB.
There are lots of games that have multiple languages and if you delete them 99% of the time it'll still work. I'll also depend on the game. Something like Yakuza might have problems if you remove the Japanese language as its a Japanese game, so keep the English and Japanese languages and if there are others they should be fine to remove.
I prefer to have more games on the HDD so the smaller the game the more fit. If movies have to be dummied then I'll do it, if unused languages have to be deleted then they are gone. BTW, UFC2010 can be dummied to 12GB by removing the 3 huge video files.
I gladly remove movies and music. If I want to hear music I'll play music, if I wanted to watch a movie I'll put on a movie, I'm here to play a game and thats all I'm interested in, the game not the movies or the music.
There are also games like Fallout New Vegas where you can edit a setting file and shrink the install. I did that and shrunk the install from 2GB to 20MB (Is it 2GB install?)
I've seen a few other games like that. 1 setting file and you edit that and shrink the install. Gladly GT5 has an option to not install. As the backup runs from Int HDD there is really no point to install it.