Originally Posted by RMXO
Boot into recovery mode & wipe from there.
If you are rooted, you can boot into CWM & do a wipe from there.
but the meaning of "full wipe" used to be (at least used at Desire HD section) like "format" of system, cache and data. So my question was put the wrong way. Sry for that and thanks again for the answer.
I have not found anything like simple .zip file to flash in CWM and have "full wiped" system, data and cache partitions. It looks like there is still no good time for such mods since SGN is still pretty new device.