pysweeper VS pynps

I'm not an expert, but I'm afraid you might have bricked the console, you can try to fix it with a application called Baryon Sweeper, just check if it's compatible with your model, it probably is because it's a 2000 model Here's the link to the project https://github.com/khubik2/pysweeper you also need a jigkick memory card and the tool to make the console enter the special mode, all the info and how to make them is in that link, depending on the model you can use a Pandora battery instead of that tool, if you have one or can make one with another psp

Baryon Sweeper connected to your PC & the battery pins on the PSP + 6.20 Jigkick inside the PSP Memory Stick slot (original source) + pysweeper running on the PC

https://github.com/khubik2/pysweeper Is the only option AFAIK

but can i use this instead?

Hello there, you can always try the Baryon Sweeper method : https://github.com/khubik2/pysweeper

Then, with a dead battery, you keep just the PCB, remove every IC / RESISTOR / CAPACITOR (not mandatory) and solder 3 wires to the terminals and build the sweeper following https://github.com/khubik2/pysweeper and it should be good.

However, given that this exploit is relatively recent (i.e. in the last few years) and the PSP 3000 is almost 15 years old, and that the Baryon Sweeper involves the use of external hardware (as seen here) I think it's improbable (but possible) that the previous owners installed M33 firmware, especially when the gold standard for PSP 3000s for years has been "light" custom firmwares with permanent patches.

I'm using pynps to download games and I hadn't had any problem until now, I downloaded the American versions of OddWorld New 'n' Tasty and Oddworld: Munch's Oddysee but the games don't appear to work, they don't appear on the LiveArea even tough I have refreshed from VitaShell.

evertonstz has a windows release for pynps, I think it comes bundled with a pkg2zip binary. Have you tried that already?