Just flashed the ROM - didn't go flawlessly.
Coming from official HTC 1.48 NLD, starting up SSPL worked fine, until the point where it's supposed to enter bootloader. That would not happen.
Then I reflashed my phone to official 1.48 NLD again, and from there started SSPL again. Now it would enter bootloader, but still I got error 260 (cannot connect).
The "USB"-word would not show up in the white rectangle of the bootscreen. That is where I decided to unplug and replug the USB cable, and then the flashing jumpstarted!
Configuring now, will let you know my findings! Thanks dutty!