Yes, you can certainly use multiple generators. We call this "Parallel Pathogen Processing," and it's unique to the Spooky2 Rife System.
In fact, we currently recommend using four or more generators in cases of late-stage cancer, Lyme Disease, Morgellons Disease, and other multi-pathogen conditions. These can all be controlled from one PC.
Multiple generators also allow you to work on different unrelated issues at the same time rather than having to deal with them one after the other.