Yes those will work in a wallstreet, and yes they are very easy to install.
There are manuals on the ifixit website if I remember right.
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iMac G5, Powerbook G3/333, Beige G3MT, PM 6200CD, RS/6000
There are manuals on the ifixit website if I remember right.
_________________
iMac G5, Powerbook G3/333, Beige G3MT, PM 6200CD, RS/6000