Brewology

i just got my psps and it had 3.90 on it how do i put cfw on it cus i am so lost respond plzzzzz

http://www.pspbrew.com/forum/viewtopic.php?t=10993
http://www.pspbrew.com/forum/viewtopic.php?t=10956
http://www.pspbrew.com/forum/viewtopic.php?t=10954
http://www.pspbrew.com/forum/viewtopic.php?t=10931
http://www.pspbrew.com/forum/viewtopic.php?t=10929
http://www.pspbrew.com/forum/viewtopic.php?t=10908
http://www.pspbrew.com/forum/viewtopic.php?t=10909
http://www.pspbrew.com/forum/viewtopic.php?t=10835
http://www.pspbrew.com/forum/viewtopic.php?t=10814
http://www.pspbrew.com/forum/viewtopic.php?t=10826
http://www.pspbrew.com/forum/viewtopic.php?t=10809
http://www.pspbrew.com/forum/viewtopic.php?t=10798
http://www.pspbrew.com/forum/viewtopic.php?t=10785
http://www.pspbrew.com/forum/viewtopic.php?t=10648
http://www.pspbrew.com/forum/viewtopic.php?t=10713
http://www.pspbrew.com/forum/viewtopic.php?t=10767
http://www.pspbrew.com/forum/viewtopic.php?t=10764
http://www.pspbrew.com/forum/viewtopic.php?t=10749
http://www.pspbrew.com/forum/viewtopic.php?t=10668
http://www.pspbrew.com/forum/viewtopic.php?t=10735
http://www.pspbrew.com/forum/viewtopic.php?t=10730
http://www.pspbrew.com/forum/viewtopic.php?t=10703
http://www.pspbrew.com/forum/viewtopic.php?t=10686
http://www.pspbrew.com/forum/viewtopic.php?t=10683
http://www.pspbrew.com/forum/viewtopic.php?t=10628
http://www.pspbrew.com/forum/viewtopic.php?t=10659
http://www.pspbrew.com/forum/viewtopic.php?t=10625

This is only going 4 pages back... and these aren't even all the topics asking how to install a custom firmware.