PSX Running Slow

I Have PSXP Emulator it also says gamefreax.de on it ... my firmware is 1.50 so far ive downloaded tony hawk 2 and twisted metal 2 and they both are running soooo slow it takes about 3 mins to get to the starting screen up i read you can speed the frames up but i tryed every button no menus ... please help !!

[ace]

Upgrade to a custom firmware, they have a built-in psx emulator. You can upgrade to 3.40OE-A, 3.52M33-4, or 3.71 M33-2. Most common would be 3.52M33-4. You can use staxx's guide to read up on some stuff-
http://www.pspbrew.com/forum/viewtopic.php?t=9454
If you want to play psx games you will need to convert the iso's to a format called an eboot. You can use popstation to convert them, check out the tutorial's section for one of the more recent tutorials on converting psx games into eboots.