I have compiled a list of four trance and hard trance IDs dating back from 1998 to 2004. If any of you could check these out and possibly resolve any of these, it would make me very happy Thanks for taking the time to check these out:

1998-1999 Hard Trance

01. YouTube - Unknown Hard Trance ID from 1998-1999

02. YouTube - Unknown Hard Trance ID from 1998-1999

2000

03. YouTube - Unknown Trance ID from 2000

2004

04. YouTube - Unknown Trance ID from 2004