To make it even easier, I've created a Maemo installer package: extrootfs_1.0_arm.deb

It bundles the script which creates the Extended Root Filesystem with utilities for partitioning and formatting the memory card (cfdisk, mke2fs, mkfs.ext2, mkfs.ext3, sfdisk). It's never been easier to extend the Nokia 770's root filesystem onto the memory card. Now you can repartition and reformat from within the device. I've also updated the HOWTO since the old Root.sh script has been deprecated and replaced with this release. Simply install the package and you've got everything you need to set it up.

Setup has become so simple:
If you've already used the Root.sh shell script to set it up, you don't really need the package, but you can install it anyway. It's fully compatible. Just use /var/lib/install/sbin/extrootfs instead of the Root.sh script from now on.

By the way, "sfdisk" is included, too - so you can try that with the info I posed above instead of using "cfdisk" for automatic partitioning.