There are some component of mylyn that I cannot install in the IDE5.0.  It's the same situation as with IDE 4.8.

Cannot complete the install because one or more required items could not be found.
  Software being installed: Mylyn Context Connector: C/C++ Development 5.2.301.v20110728-0200 (org.eclipse.cdt.mylyn.
feature.group 5.2.301.v20110728-0200)
  Missing requirement: Mylyn Context Connector: C/C++ Development 5.2.301.v20110728-0200 (org.eclipse.cdt.mylyn.feature.
group 5.2.301.v20110728-0200) requires 'org.eclipse.cdt.platform.feature.group 5.0.0' but it could not be found

With IDE 4.8 what you guys suggested to me, and it worked well, was to instead start from a clean install of Helios and 
then install the QNX component afterward.  Should I do the same with 5.0, is there a repository available?