Pug 106 - Replcaing door hinge pins?

Hi there,

I have a 99 Pegeout 106 Zest 2. Unfortunately the drivers door sags and is catching at the frame as it has dropped.

How easy are hinge pins to fit?

I need to know

1. The tools I need
2. Where I can get the hinge pins from online
3. The procedure for replacing the pins

Any help would be much appreciated as it's driving me nuts!!!

Cheers!

Alex