Tutorial
found this
''i run fw v 3.52M33v4
1st of install IRshell v3.7 onto your psp
Make sure the settings in irshell are like this

Then on the pc unrar RemoteJoy4iRS and start it all xbox 360 settings are set allready by me
They are as follows start is start select is select x circle square triangle are correct right/left bumpers are all set you can alter these in RemoteJoy4iRS\MS_ROOT\joy_1.map ....Also to exit back to irshell3.7 while connected to a game press the right analogue stick in this is exit ..Then back on the psp in ir shell select toggle usbhost redirection and make sure the usb cable connection is present.
If you have never used USBhostFS before then Windows will prompt you for this driver as soon as you attempt to establish a USBhostFS connection in iR Shell. Again, please specify this folder as source for the driver files.''
RemoteJoy4iRS
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iR Shell 3.7
PSP Downloads | iR Shell 3.7
try here i just did it, but everytime i launch an iso my psp turns off, but the controller responds to the commands i give and the highlighted part in Irshell corresponds.