Patapon 1 input lag (I want errrradicate it)

[LamerDrv]

Hi.
Please tell me, can I change a code in psp address space with emulator?

For example, game have code:
lw v0,0x4(a0)
and v0,v0,a1
jr ra
sltu v0,zero,v0

I want to change it to:
li v0,0 (or xor vo, vo, vo)
and v0,v0,a1
jr ra
sltu v0,zero,v0