What to do when ABXY and Up,down,left,right buttons get old?

Hello. I have a PSP that could use a button switch job and I was hoping someone here could give me some direction in how to do that. Normally, would you just have to switch the buttons and the silicon material underneath the buttons to be good to go?

Would these products be sufficient for this task?
http://cgi.ebay.com/new-repair-Rubber-B ... 336361a9ed

and/or

http://cgi.ebay.com/White-ABXY-D-Pad-Ke ... 2c5629660f

BTW I have a PSP 1000.

thanks

Perhaps a bit more reading could help you mate
On the description of your second item, it says "4.Installation is easy:simply pull original button off and replace with the new one. For direction pad, simply stick over your existing direction buttons."

[crait]

The buttons are really simple to install. They should be common sense whenever you're taking it apart, you just replace the old with new. :-/