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You can increase the resolution in the video settings - native (which is regular) 2x,4x,6x and so on. If you can pull off 2x or 4x without things slowing down then that might help with blurriness.

It probably is a split file and you don't have all the parts :wacko:

Make sure you're using 7-zip too, it's probably the best compression tool all around.

No just extract from the part 001 - it's just a split zip file. It'll automatically put the rest of the parts together (don't extract 002,003,etc. JUST the first) make sure all the files are all in...

Not necessarily, you can use the actual discs it's just usually better to use the image off the hard drive.

In regards to settings for PS1 games it depends on the emulator and game. If it's a...

You can use the actual discs, but I would rip or download your own games as iso/bins just faster and easier to select in the emulator without switching discs all the time - probably run faster too...

Well I just mean if you have other programs going like chat stuff, and browsers, and a music player all together etc.. Some people have multiple things running at once that can be eating up pc...

I know little about Retroarch. However you shouldn't generally have a problem either. That being said PS2 games can be very game dependent with settings in PCSX2 so just google up any specific game...