[Jay_83]

You booting like below?
.Turn on the PS2 with no disc
.Press X to go into the browser screen
.Press eject and put in your original DVD game (Big TOC)
.Press eject again and hold till gold disc comes on screen
.Let go and tray will eject slowly- swap with your DVDR backup
.Press X and play - its that simple

Note the best boot disc to use at the time of this post is GTA3 or Devil May Cry 4.37GB