modchip and backup copies :((

What ia ths best modchip to purchase for Playstation1?
Is there any difference if I have an older model, or a newer one (smaller PS One)? Is it difficult to install modchip?
What software is good for copying PS1 games?
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h//p://w/w.gamegizmo.com has so good chip so you can play ALL
your import games.and for the right models.
Clonecd for backing up your origionals psx not your psx2 with proper settings.as for installing have someone that has soldering
abilities do it for you. I have burnt a few lolololo.
 
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