So I want to speedrun the game on PC but don't own the game. Is there somewhere I can download it?

I found a ZIP archive download on oldgamesdownload dot com. Already tried it, the game works with no issues (Windows 10). There's a disk image that you need to open with Daemon Tools or a similar program. Only issue is that the installer doesn't let you choose where to install the game, it installs to the system drive.

Edit: NVM, I just found a serious problem but IDK what's the cause, wrote about it in a new thread