Auto Mount non-standard (ext2) sdcard - Android Q&A, Help & Troubleshooting

I've got a 128GB sdxc sdcard (with a Toshiba Thrive, which supports SDXC) which I recently decided to stop using exfat with (you might think SDXC only supports exfat, but truly, this Microsoft's restriction, as they are pushing they're pay to use format). Problem is, since I stopped using exfat, and tried ext2, I haven't been able to get it to mount automatically. Initially I had two partitions, one unformatted, but planned to be a FAT partition, however because of the problems I reformatted the card with only 1 partition.
Through the terminal I can mount it as root:
Code:
su
mkdir /mnt/sdcard2
mount -o rw -t ext2 /dev/block/mmcblk1p1 /mnt/sdcard2
However, even using the vold.fstab, and selecting spcific partitions, I can't get it to mount automatically.
My vold.fstab:
Code:
## Vold 2.0 fstab for tostab03
#######################
## Regular device mount
##
## Format: dev_mount <label> <mount_point> <part> <sysfs_path1...>
## label - Label for the volume
## mount_point - Where the volume will be mounted
## part - Partition # (1 based), or 'auto' for first usable partition.
## <sysfs_path> - List of sysfs paths to source devices
######################
# Mounts the first usable partition of the specified device
dev_mount storage /mnt/sdcard 8 /devices/platform/sdhci-tegra.3/mmc_host/mmc0
dev_mount sdcard /mnt/sdcard2 auto /devices/platform/sdhci-tegra.2/mmc_host/mmc1
#dev_mount sdcard /mnt/sdcard3 1 /devices/platform/sdhci-tegra.2/mmc_host/mmc1
dev_mount usb0 /mnt/usb0 all /devices/platform/tegra-ehci.*/usb.*/sda
dev_mount usb1 /mnt/usb1 all /devices/platform/tegra-ehci.*/usb.*/sdb
dev_mount usb2 /mnt/usb2 all /devices/platform/tegra-ehci.*/usb.*/sdc
dev_mount usb3 /mnt/usb3 all /devices/platform/tegra-ehci.*/usb.*/sdd
dev_mount usb4 /mnt/usb4 all /devices/platform/tegra-ehci.*/usb.*/sde
dev_mount usb5 /mnt/usb5 all /devices/platform/tegra-ehci.*/usb.*/sdf
dev_mount usb6 /mnt/usb6 all /devices/platform/tegra-ehci.*/usb.*/sdg
dev_mount usb7 /mnt/usb7 all /devices/platform/tegra-ehci.*/usb.*/sdh
The /mnt/sdcard3 mountpoint and it's command doesn't work either.
What gives?
How can I do this?
I'm guessing this isn't too device specific, but if it is let me know.
A script is an obvious option, I already tried using the odd init.rc setup (I forget the exact path, but it links to another init.rc, anyhow this failed, presumably for permission reasons? perhaps the paths hadn't been created? Honestly, I'm not entirely sure why.)