So here goes:
Disclaimer: This tutorial was taken and posted here from CSpot without asking the permission of karothacker. I don't see a problem with that I'm not claiming it's my tutorial. It is Karothacker's.
Stuff Needed:
FakeCard v1.5 (DOWNLOAD HERE)
Fake Memory Stick (of course) {If you need more info about fake memsticks, check HERE)
Windows XP (For Formating)
USB Cable or Card Reader
First Step: Formating With Windows
NOTE: Before you start you need to copy all of your DATA off of your MS
1. Click "Start" and then "My Computer"

2. Right-click where your Memory Stick is located, and then click "Format"
3. Press "Start"

4. Press "OK"

5. Wait

6. After it is formated press "OK"

Second Step: Using FakeCard v1.5
1. Type in your Memory Stick's Drive Letter (ONLY THE LETTER) & PSP Firmware Version (3.51 M33 = 351, 340 OE-A = 340, 3.90 M33 = 390, 4.01 M33 = 401, 5.00 m33 = 500.. You Understand?).
Then Press "START"

2. Click "YES"

3. Press "OK"

4. Press "Enter"
5. Wait...

6. Click "Click Me Once Format Has Finished"
NOTE: If You Get This Message Then You Need To Go Back To Step One

7. Press "OK"
8. Press "OK"

Try and see what happens!