copying self boot copies

[Gshock]

i want to know how to make a copy of a self boot game that i already have. i tried copying it with DJ2.0 using "cd player to cd recorder" but it gave me an error saying something about a buffer underun. is there another program that i can use to make copies of my self booting games? i used clonecd once and when i played it, it lagged in the beginning when it started up. but i didn't give me a buffer error. help me please.