There are several ways to downgrade. You must know what you are doing before you attempt it, or you could destroy and working PSP. I am not saying this to scare you, but you must know that messing with the firmware on anything can be danger...
http://ezinearticles.com/?How-to-Downgrade-PSP---Free-P...
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There are a lot of different ways to downgrade your PSP, which one you’ll have to use depends on your current firmware. Some are harder to break than other, but it’s always possible. ... We will be posting a simple step-by-step guide, so that nearly everyone will be able to find his or her way through the bulk...
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www.makeuseof.com/tag/how-to-downgrade-your-psp-and-upg...
www.makeuseof.com/tag/how-to-downgrade-your-psp-and-upgrade-to-a-custom-firmware-part-one/
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afterdawn.com > forums > consoles > sony psp - mod and firmware discussion > psp 2.01 downgrade program ... its going to brick your psp, don't do it; ... Just to let u,s know people ave tried this and bricked their PSP,s. Mods please delete this thread before it cause,s anymore damage.
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forums.afterdawn.com/thread_view.cfm/316381
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Downgrade your (any) PSP Now! ... Our guide will take you through the step by step process of how to downgrade any PSP firmware and you will be done within 10 minutes from now! ... ; Click the link above for your easy PSP Downgrade Guide!
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www.usfreeads.com/905006-cls.html
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[...] 1. Make sure you have 3.40oe-a firmware, you can check in your PSP’s system settings tab then system information. A guide to installing the 3.40 oe-a firmware can be found Here. If you have any firmware other than 3.40 oe-a or 1.50 you will need to downgrade your PSP, a guide can be found Here.
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ubergaming.wordpress.com/2007/07/01/psp-350-downgrade-g...
ubergaming.wordpress.com/2007/07/01/psp-350-downgrade-guide-noob-friendly/
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How is this? You can even buy used PSPs on eBay, downgrade them and resell them for $50 more. Just an idea. The market is there. With the PSP Downgrade Guide your should be able to downgrade 4-5 PSPs per hour!
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hubpages.com/hub/PSP_Downgrade_Guide
hubpages.com/hub/PSP_Downgrade_Guide
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Complete guides to PSP Downgrader, PSP Firmware and PSP Homebrew ... If you have a 1.50 PSP you don't need to downgrade. ... Downgrade Guide | HomeBrew Guide | Firmware Guide | Emulators Guide | More Guides | Home | Top of page...
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www.pspdowngrader.com/PSP_Downgrade_Guide.html
www.pspdowngrader.com/PSP_Downgrade_Guide.html
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AfterDawn has posted an article on how to downgrade your PSP from version 2.0 firmware to version 1.50. ... "This guide was written with intent of making it a little easier for new PSP users to downgrade to 1.50 to run legal homebrew apps," explains the site. "This is not a guide to PSP piracy.
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www.pspworld.com/sony-psp/psp/psp-20-to-150-downgrade-g...
www.pspworld.com/sony-psp/psp/psp-20-to-150-downgrade-guide-001642.php
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Guide: How to DOWNGRADE PSP v2.0 to v1.5- Gaming Consoles. Visit Dev Hardware to discuss Guide: How to DOWNGRADE PSP v2.0 to v1.5 ... Discuss Guide: How to DOWNGRADE PSP v2.0 to v1.5 in the Gaming Consoles forum on Dev Hardware. Guide: How to DOWNGRADE PSP v2.0 to v1.5 Gaming Consoles forum for discussing news and games...
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www.devhardware.com/forums/gaming-consoles-77/guide-how...
www.devhardware.com/forums/gaming-consoles-77/guide-how-to-downgrade-psp-v2-0-to-v1-5t-65344.html
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