Need some fps boosting someone help?

[Mugdog]

Ok, so i have been messing around and configuring with my emulator and i figured out how to keep a decent frame rate. My fps isn't the best but i can maintain 25-49 on Punch out and about the same with twilight princess but the frames drop more on twilight princess than punch out but its all playable.

Now I ask of anyone who can help. I would like to keep my framerate at 49 or 50 with the at most perfect config.

My specs:
AMD athlon X2 245 2.9GHz
2GB ram
ati radeon HD 4650 1GB OCed PCI-e
Windows xp SP3

Any help to speed up my stuff? please and thanks.