Thanks rmoriar. Here's the (second part of the) randomization method:
Put the following list in alphebetical order:
mersenneary
mizzle
nicecatch08
Kierk1
bmwatts
Mattraq1
KarlizL
ITRIED2WARNU
rumnchess
mc4chess
jayluf
eric79
PrimordialAA
rmoriar1
cheese danish
Chipleader
The first person on the alphabetized list gets random.org generated #1, #17, #33, and #49. The second person on the alphabetized list gets random.org generated #2, #18, #34, and #50. The third person on the alphabetized list gets random.org generated #3, #19, #35, and #51. This continues until the last person on the alphabetized list gets #16, #32, #48, and #64.
Confirmed via this PM (ChiRy will also confirm in thread):