psp mod help

[kurd]

i want to mod my psp but i need help and i want to know is it possiblie to do this
what i want to do is  try to put a phone in the psp and use skype on it or voip to call for free not using the internet or trying to use a  gps and put it on the back of the psp

also i jus though of this if you can take a gps software and mod the software where it runs on the psp and the you can just pop in the gps and ride

please  help i  want to try this but i want to know which is possible and not mess anything up 

thank you!?