OKay I'm only to help on this one more time. :P

#1 get 2, 2 liters of Mountain Dew
#2 get some munchies like doritos or beer nuts
#3 commit yourself to hours & hours of a lot of work
#4 get a decrypted dump of the FW
#5 look in the customizing bored of this forum for prx modding app's
#6 look in the PSP Tutorials / Guides to read about how to use the apps
#7 don't be one of them people that won't do anything tell some one said it is safe, try stuff
#8 come back to this post after you did that stuff & tell me how it went :)
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I hope you will make some cool stuff, & give back to EP with your work

every thing you need to know is here just look :)
O yeah Welcome to EP