You can DIY it, YouTube is your friend on that. But honestly, this is one job that's just easier and cheaper to leave to the dealer. My dealer has a truck outfitting for this job, and they can drive to the customer and do the job in 30 minutes.
Worst case, your dealer does zero ag work and only has stationary equipment, you put your machine on a trailer and haul it to the dealer. They can do the job right on the trailer.
My dealer does not carry RimGuard brand, but they carry another generic bioballast (also beet juice) which has slightly higher weight density than RimGuard-brand
ballast.