Question about switches

[ultimaarashi]

Yea, I was thinking of modding my PSP, with a few things.
(A): Taking out the UMD drive.
(B): Putting in my old 1 gig memory card in there.

Now, I would soder the old memory card directly to the card reader, and have a switch that would turn it on or off. My question is: Would this work? To those who don't understand vauge, here's a general picture:
http://www.freewebs.com/ultimatearashi/apps/photos/photo.jsp?photoID=1455229

Yea, I was just wondering where one might get a switch that's small enough to fit in a slim, and has 20 connections. I'd need ten per side (On and off). Also, has this been attempted before? I know someone added a 4 gig HDD to their PSP, but I've yet to see a memory card.

Thanks.

Thanks.