I also had to resolve this issue when I myself performed this function, as I pointed out earlier in this thread:

[QUOTE= Where the directions say "insmod /mnt/initfs/lib/modules/current/ext2.ko" I had to do the following:

a. insmod /mnt/initfs/lib/modules/2.6.18-omap1/mbcache.ko
b. insmod /mnt/initfs/lib/modules/2.6.18-omap1/ext2.ko [/QUOTE]

However, to give credit to Fanoush, he pointed out that this might be necessary in his Partitioning wiki (cited in his Root/MMC wiki). This was apparently before he himself had a N800 and he wasn't certain if this would be required (as it was). I expect it might be useful for someone now to correct both wiki's, to save those who come after us the trouble of sorting it out afresh.