How to start one fixlet "Create VM from VMware Template" simultaneously

How to start one fixlet “Create VM from VMware Template” simultaneously on several vCenters? I have about 90 different vCenters and prepared a template with Windows machine. I made the same names for templates and prepared script to configure ip addresses, but I have a problem. I have a list of datastores names, agents, but my action successfully finished on one vCenter only. Today I must to take an action on every vCenter - 90 times :frowning:

Thank you!
Evgeny