よく使うリンク一覧です。

よく使うFW(ファームウェア)link

1.50
http://dl.qj.net/PSP-Firmware-1.50-
File-(EBOOT)-North-America-PSP
/pg/12/fid/163/catid/163

2.70
http://dl.qj.net/PSP-Firmware-
Update-v2.70-Japan-PSP/pg/12
/fid/7172/catid/163

2.71
http://dl.qj.net/Firmware-2.71-PS
P/pg/12/fid/8046/catid/163

2.80
http://dl.qj.net/System-Firmware-v
2.80-Japan-PSP/pg/12/fid/9073/catid/163

3.03
http://dl.qj.net/PSP-Firmware-3.03-
PSP/pg/12/fid/11844/catid/163
http://www.psp-hacks.com/file/958

3.10
http://www.psp-hacks.com/file/1037

3.11
http://www.psp-hacks.com/file/1056

3.30
http://dl.qj.net/FW-3.30-Update-PSP/p
g/12/fid/13367/catid/163

3.40
http://dl.qj.net/PSP-FW-3.40-for-the-US-
PSP/pg/12/fid/13547/catid/163

3.50
http://dl.qj.net/PSP-Firmware-3.50-(Japa
n)-PSP/pg/12/fid/13829/catid/163

3.51
http://dl.qj.net/Official-PSP-FW-3.51-PSP/p
g/12/fid/14003/catid/163

3.52
http://www.psp-hacks.com/file/1209
http://www.pspsource.de/download.php?vie
w.1897

3.71
http://www.psp-hacks.com/file/1259
http://www.pspsource.de/download.php?v
iew.1989

3.72
http://www.psp-hacks.com/file/1337

3.80
http://www.psp-hacks.com/file/1377

3.90
http://www.psp-hacks.com/file/1406

3.93
http://www.psp-hacks.com/file/1435

3.95
http://www.psp-hacks.com/file/1451

4.00
http://www.psp-hacks.com/file/1505

4.01
http://www.psp-hacks.com/file/1506

4.05
http://www.psp-hacks.com/file/1520

5.00
http://www.psp-hacks.com/file/1568

こういう裏サイトで手に入れるより
公式サイトで手に入れましょう