I think that you can use customization plugin 
com.qnx.tools.ide.momentics and in plugin-customization.ini file add line
org.eclipse.help.appserver/port=.....
See 
http://help.eclipse.org/help32/index.jsp?topic=/org.eclipse.platform.doc.isv/guide/ua_help_setup_infocenter.htm
Actually I didn't try it myself:-)

On 06/02/2009 4:50 AM, mike ko wrote:
> Hi,
> I want to use IDE 4.5 help from remote host. But after every restart http server starts on new random port. In 4.0 
there were Help Server Option in Preferences..in 4.5 it's absent.
> How can I setup fixed port number in 4.5 Bundle?
>
> _______________________________________________
> General
> http://community.qnx.com/sf/go/post21572
>
>    

You can start eclipse infocenter without actual IDE from command line:

cd <IDE installation folder, parent of eclipse folder>
cp eclipse/qde eclipse/eclipse #this needed because otherwise tool would not recognize installation folder
java -cp eclipse/plugins/org.eclipse.help.base_3.3.1.v20070813_33x.jar:eclipse/plugins/org.mortbay.jetty_5.1.11.
v200706111724.jar org.eclipse.help.standalone.Infocenter -command start -eclipsehome eclipse/ -port 7000 -vmargs -
Xmx512M


To access it:

http://localhost:7000/help/index.jsp  (assuming you run on 7000)



mike ko wrote:
> Hi, 
> I want to use IDE 4.5 help from remote host. But after every restart http server starts on new random port. In 4.0 
there were Help Server Option in Preferences..in 4.5 it's absent.
> How can I setup fixed port number in 4.5 Bundle?
> 
> _______________________________________________
> General
> http://community.qnx.com/sf/go/post21572
>