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How to seing my PC to Get high FPS???

ASRock G31M-VS2
Microsoft Windows 7 (6.1) Ultimate Edition 32-bit (Build 7600)
ATI Radeon HD 4300/4500 Series
Pentium® Dual-Core CPU E5200 @ 2.50GHz

I'm afraid you won't get much out of your pc with about 90% of the games through PCSX2, in other words your pc is quite weak for PCSX2, you can play for example Kingdom Hearts and/or Final Fantasy X with some tweaking, but you really should start to think to upgrade your pc

So that's mision impossible??

For now, yes.
But since you seem to own 3 ps2, i suggest you keep playing with them until you can afford a better machine.