It's probably too late to help OP, but since nobody mentioned this, here it goes.
Any PSP that can use Pandora can boot directly into any CFW (because of the possiblity of using custom IPL) and can be flashed with any OFW/CFW on top of any OFW/CFW/"noFW" (no problems with unbricking and downgrading).
Owners of newer, Pandora-incapable PSPs have to manually start their CFW on every cold boot (having swapped the battery, for example) using CFW-specific loaders on memory card OR they have to use an outdated firmware v6.20 with "permanent patch". Downgrading of these units is a risky business because unbricking is impossible and repairs will cost more than buying another PSP.
Out of all Pandora-capable PSP-2000 the very first ones* are better than the rest because they can create Pandora batteries**; other PSP-2000 can only use Pandora batteries created somewhere else***.
__________________
* with TA-085v1 motherboards, they have date codes 7C and 7D in Europe; USA and Japan don't use date codes, making identification more difficult.
** provided that the battery has PSP-programmable EEPROM. All original Sony batteries bundled with such PSPs are suitable, all batteries bundled with "post-8B" PSPs aren't, in-between ones are a mixed bunch but mostly suitable.
*** which nowadays means DX/aliexpress and other Chinese vendors, since Sony stopped making convertable batteries in 2008.
>i intend to use ISOs of translated Japanese VNs that i bought on Japanese store...Are the 3k screen issues noticeable in visual novels?
VNs are 99% static images, and ghosting/interlacing is not applicable to static (non-moving) images by definition.
Frankly speaking, you're better off reading English-translated PSP VNs on another, less eye-straining, platform (that is PC, either natively or via PS2/PSP emulators).
Also, just in case, don't even touch H-VNs on PSP, they're horrible even for their main purpose because of the format limitations imposed by Sony (gameplay = watching literally interlaced videos a la Hirameki's stuff for DVD players).
Any PSP that can use Pandora can boot directly into any CFW (because of the possiblity of using custom IPL) and can be flashed with any OFW/CFW on top of any OFW/CFW/"noFW" (no problems with unbricking and downgrading).
Owners of newer, Pandora-incapable PSPs have to manually start their CFW on every cold boot (having swapped the battery, for example) using CFW-specific loaders on memory card OR they have to use an outdated firmware v6.20 with "permanent patch". Downgrading of these units is a risky business because unbricking is impossible and repairs will cost more than buying another PSP.
Out of all Pandora-capable PSP-2000 the very first ones* are better than the rest because they can create Pandora batteries**; other PSP-2000 can only use Pandora batteries created somewhere else***.
__________________
* with TA-085v1 motherboards, they have date codes 7C and 7D in Europe; USA and Japan don't use date codes, making identification more difficult.
** provided that the battery has PSP-programmable EEPROM. All original Sony batteries bundled with such PSPs are suitable, all batteries bundled with "post-8B" PSPs aren't, in-between ones are a mixed bunch but mostly suitable.
*** which nowadays means DX/aliexpress and other Chinese vendors, since Sony stopped making convertable batteries in 2008.
>i intend to use ISOs of translated Japanese VNs that i bought on Japanese store...Are the 3k screen issues noticeable in visual novels?
VNs are 99% static images, and ghosting/interlacing is not applicable to static (non-moving) images by definition.
Frankly speaking, you're better off reading English-translated PSP VNs on another, less eye-straining, platform (that is PC, either natively or via PS2/PSP emulators).
Also, just in case, don't even touch H-VNs on PSP, they're horrible even for their main purpose because of the format limitations imposed by Sony (gameplay = watching literally interlaced videos a la Hirameki's stuff for DVD players).
