Using Suppression in a PM Schedule

I have a PM schedule definition that I would like to implement.  The schedule contains multiple activities, each of which is repeated every:

2000 hours

4000 hours

8000 hours

16000 hours

Since these overlap, I would like to only allow the least frequent activity to create a work order.  For example, at 16,000 hours and 32,000 hours, the only work order that I would like to create is the 16,000-hour work order.  I had planned on setting up the following rules:

• 16000-hour activity suppresses 8000, 4000, and 2000
• 8000-hour activity suppresses 4000 and 2000
• 4000-hour activity suppresses 2000

but that is not allowed.  An activity may only be suppressed by one other activity ("one can only be suppressed by one").