PSone and GBA
Its not possible Found this on the emulator-zone pages if you look at the RAM of each system you will see why...
PSone Stats:
32 bit RISC processor
Clock- 33.8688MHz
Operating performance - 30 MIPS
Instruction Cache - 4 KB
Data Cache - 1 KB
BUS - 132 MB/sec.
Data Transfer Rate (DMA TO RAM) 150 KB/sec. (Normal) 300 KB/sec. (Double speed)
Maximum Capacity - 660 Megabytes
Main RAM: 2 Megabytes Video RAM: 1 Megabyte Sound RAM: 512 Kilobytes CD ROM buffer: 32 Kilobytes OS ROM: 512 Kilobytes
GBA
CPU: 16 MHz 32-bit RISC-CPU + 8-bit CISC-CPU
Memory: 32KB WRAM + 96KB VRAM + 256KB WRAM
Display Ability: 32 000 colours