Hello Paul, Brian, others,
To follow up on my original email (http://dev.eclipse.org/mhonarc/lists/p2-dev/msg04129.html) , I followed the suggestions from http://aniefer.blogspot.com/2009/07/composing-and-updating-custom-eclipse.html and http://aniefer.blogspot.com/2009/07/adt-part-2-more-like-epp.html and a bit of digging into http://dev.eclipse.org/viewcvs/viewvc.cgi/pde-build-home/examples/adt.builder/ but my latest hurdle is that, even after amending my build with a customAssembly.xml that ran the director to install the extra features:
[sbb:eclipse-ant] pre.archive:
[sbb:eclipse-ant] [echo] Executing customAssembly director installs of extra features for F:\sbxbuild\813\co\streambase\apps\ide\plugins\com.streambase.sb.studio\studio.product
[sbb:eclipse-ant]
[sbb:eclipse-ant] runDirector:
[sbb:eclipse-ant] [p2.director] Installing org.eclipse.gef.feature.group 3.6.2.v20110128-0100-777B381A4Bz06565376E32322.
[sbb:eclipse-ant] [p2.director] Operation completed in 2516 ms.
[sbb:eclipse-ant]
[sbb:eclipse-ant] runDirector:
[sbb:eclipse-ant] [p2.director] Installing org.eclipse.jdt.feature.group 3.6.2.r362_v20101117-0800-7z8XFW6FLFlmjJcvz03jyeFBLS_F.
[sbb:eclipse-ant] [p2.director] Operation completed in 2719 ms.
(etc)
I still cannot update features! Here’s how things look in the UI (notice the update buttons are disabled)…

And here’s what the P2 UI says if I try to update the SVN feature:
Cannot complete the request. See the error log for details.
Subversive SVN Team Provider (Incubation) will be ignored because it is already installed, and updates are not permitted.
As a reminder: PDE headless build, off a feature-based .product file.
Thank you,
- Eddie