swap method?

[themis_t]

is there any swap method without having to open the lid of my ps2 so i can keep the guarantie?i would also like to know what's going on with the mod chips(external,internal)is there any way that if you put an external or internal mod in your ps2 there may be released games that will not be able to have a copy that works in a chipped ps2?so if i put a mod in my ps2 will i have also to download the patch for each game i want to copy or i will be able to copy the game direct from the original cd without the need of any patch or other stuff that i should download from the internet.is it safe to buy a modchip from the internet(i don't want someone to keep taking money from my account!!!)will the procedure of "installing" the mod down the ps2 be difficult?i would like to get a reply for all this stuff cause i just bought my new ps2 and i wouldn't like to pay for the original cd's...
if someone can answer please do it.