a bit BLURRR about this rooting process..
from my understanding:
1) Install VISIONary+ to DHD..
2) Open VISIONary and pick TEMPROOT NOW..
3) In VISIONary also, pick ATTEMPT PERMROOT NOW.. (enable SU)
** Use TERMINAL EMULATOR to confirm PERMROOT, if got #, means DONE is it..?** 4) Do S-OFF process..
5) Enter ROM MANAGER to flash CLOCKWORKMODE RECOVERY..
** How to check MD5# whether match or not..?**6) Put preferred ROM is SD Card..
7) Boot into RECOVERY (via ROM MANAGER)..
8) Do NANDROID BACKUP first (b/up default ROM)
9) WIPE DATA (clean install)
10) Flash ROM from ZIP file..
so for others who flash custom ROM successfully, is it the correct way..?

Run Terminal Emulator, and type in "su" without quotes. It will change your prompt from $ to # meaning success rooting.
.