First of all, WHDLoad already INDICATES that the stuff is about Amiga. So no need for it... Here my contributions:
WHORE - WHDload Originals REnamers
AWFUL - Amiga WHDLoad Files Under Law
ARGH - Amiga Renaming Group for HD-Games
WEW - WHDLoad Experts at Work
PUDFU - Please Use Databases From Us
WIRG - WHDLoad Installs Renaming Group
TOSAC - The Old School Amiga Centre
WIDAG - WHDLoad Install Database Achievment Group
FARWI - Fans Are Renaming WHDLoad Installs
I like ARGH and WIDAG best.
EDIT: Burseg's idea is great.
EDIT2: ARP already stands for "Amiga Redump Project" (by Duke)