I would suggest to copy and paste X-Terminal output here to look, the description might, as crystal clear it is for you, not tell everything here.

The basic setup in the nokia europe forum does only create swap and a small data partition, If this is good enough for you, fine, go ahead! Nevertheless please post the error messages here not a description.
It may be that you are struggling right now, because maemo automatically mount the external card as data partition only. Thus you are not able to work with it.[code]sudo gainroot
umount /media/mmc1[code]Then you are able to proceed with the howto.

The big advantage of the setup created by the procedure discussed in this very thread here http://talk.maemo.org/showpost.php?p=933228&postcount=8, you could easily clone the setup to any larger microSD card later and would need only to adjust the partition sizes with Gparted.