According to the first post in the PlainJane thread over at XDA (
[ROM]Plain_JaneT2 V2.0 7/18/10 Stock With everything ROOT!! - xda-developers ), this is the way to set up your card for a2sd.
Remember to BACKUP your sdcard before doing the step below!!!.
Things you need to know and do.
How to set up your sd card for a2sd:
Code:
1. Boot into recovery
2. Scroll down to PARTITION SDCARD
3.Click On PARTITION SD
4.Click trackball to confirm
5.Select Swap size 32mb is fine
6.Select ext size (I did 768mb you don't have to make it that big)
7.Click again to partition sd card.
8.Go to PARTITION SD menu and choose SD:ext2 to ext3
This New A2sd Makes it so when you go to the data/app folder, it actually takes you to the /system/sd/app folder. So when you use Root Explorer to look at the data/app folder you are actually looking at the /system/sd/app folder.
You know you are in the /system/sd/app folder in root Explorer because at the very top it says something like this "92.88MB used 593.51MB free" as we all know the Eris doesn't have that much space in the data/app folder. The space in the data/app folder might still be going down because the cache isn't moved to the sd card by default, if you want to change this you can change it yourself.