Passed 220-302 today (or yesterday, Friday the 28th, now I guess.) Stumbled upon this site like 2 days before my test and am glad I have fellow certification seekers to mingle with.
Passed Hardware on Nov. 29 with a 622 and OS on Jan. 28 with a 613. Not super-high - but I'll take it!
Also a neat lil' pneumonic I made up for the Windows 9x/Me boot order is:
I M Fig Man Auto, Start Win
(
IO.SYS,
MSDOS.SYS, CON
FIG.SYS, COM
MAND.COM,
AUTOEXEC.BAT, WIN
START.BAT,
WIN.COM)
It helps if you say it in a robot-like voice: I am figman auto, start win

A neat one for the NT-kernel based OSes is:
Loader Bill's In Bull Durham North Carolina, North South? North East?
NTLDR (Loader),
BOOT.
INI (
Bill's
In),
BOOTSECT.
DOS (
Bull
Durham),
NTDETECT.
COM (
North
Carolina),
NTBOOTDD.
SYS (
North
South),
NTKERNL.
EXE (
North
East)
Don't know if any of those lil' devices I used will help anyone, but just thought I'd share (in fact I'm not even sure if that's the right boot order!!!

)