I'm glad you found the link helpful!
I don't know for sure whether you would have problems, or not, as I don't know what the script does, how "efficient" it is, etc. My warning was just so that you would consider the issue. I will say that if the script significantly loads the server "several" times a week, DH would be correct in preventing it's use on a shared server.
At the very least, I would suggest, if you use such a script, that you carefully target when it is run to be at a very "low load" time when fewer users are likely to be impacted. Actually, I would run it past DH support first, as there are certain other issues involved; by setting your execution time so high, you risk any "runaway" script running as your user to also risk overloading the server.
Those are just my thoughts, and I am not a DH employee, so please remember that YMMV