have you try to double the "/" or "\"character ?
In what context? Where are you talking?
from what I understand you try to deploy it via a blpackage ?
in the blpackage you have create an external command that run the install.
you can also put the file via the blpackage and try a post command in the job.
my idea was that some characters have been removed.
I'd suggest looking at the Transaction logs. These live under you nsh install path on the remote agent, i.e. <path_to_nsh>/Transactions/log and they contain not only the commands executed by the agent including any dictionary lookups but they also capture the sysout from the remote system. Hopefully that log will tell you what went wrong.