Hi. I just got a PSP phat with TA-082 that came with the 1.5 firmware. Can I upgrade it to the latest 3.90-m33-2 firmware? OR should I keep it at 1.5? Any performance advantages between either firmware? (I'm actually a noob to all this until yesterday when I started reading up on it. But this is based on my assumption that since I'm running 1.5, I don't have to worry about downgrading or anything like that and I can just install custom m33 firmware on top of it, right?)

And are there any issues with running homebrew apps on a PSP with TA-082 motherboard (other than not being able to downgrade past a certain firmware, which I guess doesn't apply to me since I already have 1.5)?

Thanks!