I want to keep my system tidy and has limited space on my SSD. Can I install the IoT dev kit software by itself to a main Eclipse installation that I already have. I tried changing the devkit-launcher.bat to my main Eclipse but that doesn't seem to work.
Changed START %DEVKIT_HOME%\eclipse-win\eclipse.exe > START %my_main_installation%\eclipse.exe
What Eclipse version are you using right now?
I believe the information you are looking for can be found in the Native Application Guide http://www.intel.com/support/edison/sb/CS-035382.htm Intel® Edison Boards — Native Applications Guide