You Keep Me Hangin On (Almighty Mix Edit) - Various - Promo Only Rhythm Radio: May 2004 (CD), The Curling Song - Bowser & Blue - Montreal Souvenirs (Cassette, Album), Valentyne Suite - Colosseum - Those Who Are About To Die Salute You (Vinyl, LP, Album), Go With Love (Dream-X) - Black Diamond - Go With Love (Vinyl), Action Satisfaction (Dub), Happoradio - Ihmisenpyörä (File), Blak Twang - The Queens Head (Vinyl), Thirteen Black Cats, What Jail Is Like (The Morning Version), Das Ding - Terrorgruppe - Non-Stop Aggro Pop 1977-1997 (CD), You Can Leave Your Hat On - Various - Twogether Pop (CD), Cad II - Ray Wonder - A New Kind Of Love (CD, Album), Soko - Mira Škorić - Best Of Mira Škorić 1 (CD), Claude Debussy - La Mer And Nocturnes. The Cleveland Orchestra. Lorin Maazel Conducting (Vinyl, LP), Give - The Scribbler - Discography (2005-2010) (File, MP3)
Due to contractual restrictions, Paul was unable to release music under the Hardcastle name. So, in October , under the pseudonym The Deff Boyz, he released a 12" single entitled The Deff Boyz Featuring Tony Mac - Swing, which crashed in at #4 on Billboards 12" .