After doing this "
This method is more difficult, dangerous and will make things hard when disabling the prx (remember you can use L to make it abort it's loading process).
Write access to the flash will be required so be very careful! No one will be held responsible if you brick your own console.
WARNING: Be careful when writing to flash! This may cause unwanted effects to the PSP.
FLASH AT YOUR OWN RISK!
This method is mainly useful if you want to keep the prx always loaded or if your memory sticks are too slow(examples of them are datel hd, lexar or fake memory sticks) and the custom firmware can't load the prx properly.
First of all, you need to prepare the cwcheat.prx and be sure to have space to copy it to your flash. Then enable the flash0 usb support from the recovery and go to the kd folder and copy the cwcheat.prx there. Finally open the pspbtcnf_game.txt with a text editor and add the line $/kd/cwcheat.prx after $/kd/mediasync.prx.
Save the file, unmount the disk device, disable flash0 usb support and enjoy
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I went to the plugins option but there was nothing there. I only copied one .prx file in there also.