Well, I did use this "downgrade_for_bl=3.sbf" thingy.Maybe it is because latest build does not contain kernel and you need to flash froyo kernel separately or flash previous version of rom and then upgrade. If you want try, here is froyo kernel.
I'll try the .sbf you supplied.
DAMN - there's a space in the middle of the name:
Code:
MILS2_U6_4.1-22_SIGNED_UCAMILESTONE2B1B80E1014.0R_UCXMILE2GBQWR TGB_P016_A006_HWp2a_Service1FF.sbf
^
here
That's why i couldnt find it :X