If memory serves me correctly, he used Trumpeter for Fireburst. A huge spread of his roses were listed in an ARS article in the late 90s. Its been so long that I cant claim accuracy.

My Acapulco Sunset is in bush form, but it's about 8 feet tall.

This "Dream Orange" rose is now being marketed under the name "Acapulco Sunset" and is distributed through Home Depot as a floribunda, not a hybrid tea. See, http://thepremiumrosecollection.com for more information.