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Some guidance is needed. I bought a PSP go from eBay has cfw already on it. It's on update 6.20 Pro-B10 : r/psphacks
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PSP 2020 Definitive Guide | How to install permanent custom firmware 6.61 PRO-C | Infinity 2 | ISO - YouTube
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PSP: Revision 2.3/10.3 of the ME & LME CFW is now available - Adds Pro Online support, DAX-format and more! - Wololo.net
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HOW TO INSTALL 6.20 PRO B-10 B10 PERMANENT PATCH ON PSP GO (NO PANDORA) *PSP 1000 2000 3000 Go* - YouTube
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