Welcome to the Forum, jello.
Yes this is the correct place for your question.
As for your problem, you do not have to install the game, in order to play it. Just type "star" in the Dos prompt. If you try to install the game it simply copies the exact same files to another directory. The reason the install program is asking for disk 1 is that you probably have crossed out the speech pack. This feature does not exist on the english version.
Keep in mind that this is a German remake of a game in English. Germans, in particular, are not good translators. (Watch out for the occasional mistranslations in the game). And there are very few germans who speak English. That is the reason why speech is not included.
The option is only left in the install program. They probably forgot to remove it.
Hope this has helped you a bit.
(Remember to download the manual and map too).
(Also it took me some time to make them :wink: )