PS1 games on my PS2

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I have successfully burnt several PS2 games for my PS2 now and was looking at doing the same for some of the great PS1 games out there. When i burnt games, I ripped using CDRwin and then patched using the ASA patcher. I then reburnt using CDRwin. Can I use the same programs for PS1 games, or do I need a different patcher program? And help would be appreciated.