Hmmm....
To permabrick your PSP simply place it in a Microwave. set it to full power and five minutes.
No recovery posible.
to install Custom firmware check
THIS THREAD to find someone in your area.
Also read up if you might have a TA88-v3 Mainboard in your PSP (only aplicable on Slim PSP's) or if you have a 'bright' model. Those both models cant install CFW at the Moment.
Oh... and dont try the thing with the Microwave.
It is as stupid as asking for help to pirate games on this Forum.