Hi @robi,
I appreciate your work on this as I own an HP t5730 on which I would like to install pfsense. Since your last post, the older versions prior to 2.4 have been removed from the pfsense download site.
So, I am unclear whether there is a way to directly install the current nanoBSD version on the HP t5730 or if there is a workaround (finding an old version of pfsense elsewhere and then upgrading in accord with the instructions you have provided, installing a current version to a computer, modifying it to fit on the HP 1 GB flash and "dding" it to a USB drive and then installing that, or...).
Thanks in advance for advice.
stevesr0