Hacking the firmware depends on the PSP's motherboard, not the current firmware installed. If you're asking whether or not it can be made into a custom firmware, then the answer is yes, but all homebrew would have to be rewritten for it.
All psp 3000 should be hackable because they all come with the same firmware. Once you get it as long as you dont update the official sony firmawre it will be hackable.
Currently the PSP-100x and PSP-200x series are hackable. the PSP-300x is not yet hackable.
It's not the firmware that matters, it's the motherboard. A hackable motherboard can have custom firmware installed no matter what version of the official firmware it uses. 'Unhackable' (at present) ones can't have custom firmware installed at all right now. All phat PSPs can be hacked, most slims can, but recent ones can't, and at present, PSP-3000's can't at all.
Yes, you can if you have a 1000/hackable 2000. See http://pspslimhacks.com/easy-chickhen-custom-firmware-installer-without-pandora/
Most Slims (PSP 2000s) are hackable except the very new Slims that come with firmware 4.01 official or over
By slim, you mean PSP-2000. By lite, you mean PSP-3000. main differences- PSP 2000 is hackable.(Most are, some arent) you can install Custom Firmware to it. The psp 3000 is unhackable at the moment. The psp 3000 has many bugs with the screen, where it messes up.
it depends on your psp. for example i am using PSP-2000 which i use firmware 4.01 and for my PSP-3000 i am using firmware 5.03.
The newest known firmware for the PSP is 5.54
Yes, you can The firmware goes across board to all models of PSP. This includes the Customer Firmware and the Original Firmware.
Depends on the PSP motherboard. Some can't be cracked.
New version comes out is the best version but i should be custom firmware because without custom firmware you can not play free games in PSP.
I'm not sure what you mean by "the mod" but I think you may be referring to a "custom firmware". If so, you can safely format your PSP's memory stick without removing the custom firmware. This is because the custom firmware is stored in the internal PSP flash memory, not on your memory stick. If you want to remove the custom firmware, you will need to just install an official firmware onto the psp. The easiest way to do this is to put in a PSP game that comes with a firmware upgrade and choose that option. Then I would recommend having the psp do a Network Update.