This is before swapping
Just before u do this REMEMBER BACKUP YOUR PHONE.IT"S REALLY IMPORTANT!!!.
Refer to my earlier post of flashing CWM for the backup.
ALTHOUGH THIS MOD IS TESTED,I AM NOT BE BLAMED IF ANYTHING GOES WRONG.
Now,let's get our hands do the dirty work!
1 - Install Root Explorer or Root Browser.Any 1 is good.
2 - Copy every folder that is present in your internal sdcard to the external sdcard, so that your apps and games continue to work once you have swapped the sdcards.
3 - Browse to the location /system/etc and you will find a file named "vold.fstab"
4 - Open it with a Text editor and do the following Changes
DON"T CHANGE ANYTHING ELSE.JUST CHANGE WHAT I HAVE HIGHLIGHTED!
Ta Da!!! You are done.Just Reboot you'r phone and see the magic!!
Just remember to format your new external sdcard( which was you'r internal) as you have already copied the file to the newly made internal card!!