[Q] Preparing for DG, little confused

damn i hate being a n00b:)

OK, been reading for several hours... some interesting stuff and some garbage as well.

i have 2001b model on OFW 3.56. plan on using Players' E3 Flasher guide. (good guide BTW)

1st: E3 Flasher..
after the downgrade can the flasher be removed, or keep using the ESATA station??

2nd: Downgrade Dongle yes/no
must i use a Dongle, or would the FSM Tool do the same??
when i search downgrading without Dongle, it points to this tool^^

also i read of a PSP tool to use during downgrade
would either of these work for me??
if so, which is best??

3rd: Dual Boot
from what i gather, Dual Boot is for swapping between CFW and OFW
does this require two HD's??

also if CFW 4.30 runs current games, is Dual Boot even needed??

Final question: CEX or DEX
i understand CEX is Retail, so obviously i would be on CEX
Do i need to concern myself with CEX-DEX conversion??
or does this take place during CFW install??

sorry if the answers are out there, but i couldnt find them
sorry for the lengthy post too...
believe me, i have been on the other end of this convo with other devices and forums:)