Since file front is getting suspended, I'm uploading my file from File Front That got a sh*tload of downloads.
This is the dplay.dll file that didn't come with Doom Collector's Edition I got from Amazon.com, you don't need it if you have Windows XP because it comes with it, if you have Window's Vista and you keep on getting a error saying that you're missing the dplay.dll file, download this.
C:\Program Files\DOOM Collector's Edition\Ultimate Doom
C:\Program Files\DOOM Collector's Edition\Final Doom
C:\Program Files\DOOM Collector's Edition\Doom2
That should do it.