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Is it hard to replace them?
I have modded about 150 boxes or so.
it's about the same as replacing the memory. not as easy as installing a modchip tho. I've only done it twice and was successful both times. Perplexer is the guru on this stuff, but i've sent chips to a bunch of people and they seemed to be successful installing them. there is a nifty video somewhere on these forums on how to remove/install the ram chips..wish i could remember who did it to give them props, but a search of the forum should get you there.