Isn't whdload piracy anyway, since the authors of the games don't get any money, do they?
The installers don't contain any data or files from the games, you have to supply the game disks during installation, alternatively download finished installations from sites like whdownload.com.
You could also argue whether copying old games constitutes as piracy or not. These games have not been commercially sold for 20 years, and no one's business or income is getting hurt from us copying and enjoying the games.