I checked through the forum and didn't see a thread talking about this specific.PM2 problem.

I'm using a windows 98 computer, and I don't have DOSbox. First, I tried copying all the unzipped files to a folder and opening the program through it's EXE file. It gave me an error saying it couldn't find a certain file, but that file was there.

I then decided to run the installation, which solved my first problem and when I clicked on the EXE file, it would now restart my computer in DOS mode, but the problem is, I cannot get past that point. It gives me an error and then restarts again, not in DOS mode. Anyone know what I should do to get around this?

Should I download this "DOSbox" and see if that helps, or is the problem just something to do with my load-o-crap computer and thus, can't be fixed?

What is the error it gives you?

First of all, don't install the game. It is already in installed state, just copy the files from the ZIP into a folder, that's all you have to do. Seeing as it says that it can't find a certain file it's maybe because the download was incorrect, so you would need to download again, also because you installed the game while no need and damaged the files.
And don't run the game in Windows 98 directly, try it either in the Dos prompt-attachment (or just Run - "command.com") or if there's still error, try it after quitting Windows and running in pure Dos mode. There you need to work on autoexec.bat and config.sys though, to get more memory and to load the mouse driver. The game doesn't require a soundcard as there's not much to listen to anyway, but if you have soundcard drivers for Dos you could load them too.

Do you have Dos drivers for your soundcard & the like?