Originally Posted by
YKB
I used X-flash first (that was before I updated the 3.03 OE-A2) to permanently remove the network update feature and free a little bit of space on flash0 (although the icon remains in the XMB) and then flashed it using PSP filer.
I had to do it this somewhat complex way because the gameboot wouldn't write to flash0 as apparently there's only 20.3MB max capacity. That's why X-flash limits the gameboot size to 196KB, due to lack of space with the version 3.03fimware files and the 1.50 subset.