I thought someone would have pointed you to this thread by now:
Challenger5.7 posted a great How-To with lots of excellent pics
Here's the link (thanks Challenger5.7):
Challenger 5.7's Mod Journal
Here's My Experience:
The the R/T and SRT rear spoilers both have the exact same mounting holes and hardware.
Stock R/T and SRT rear spoiler is held on by:
Two (2) permanently attached studs with nuts at the spoiler ends (visible on the spoiler when you open the trunk)
Three (3) clips, evenly spaced between the the studs (hard to get at but possible from the underside of the trunk)
Four (4) pieces of tape -- Two (2) pieces between the center clip and the outer clip on each side. Each piece of tape is 2" x 3" and is super strong.
You need to cut the tape (with something like fishing line) and then pop the clips. I would keep the nuts loosely attached to the studs when you pop the clips so that the spoiler doesn't "jump" when you pop the clips and scratch the trunk lid.
Note: If you break the center clips PM me, I might be able to help you out.