due to IT restrictions I cannot use to package-install-automation of the Android SDK.
To be able to create an emulator in Androids\' AVD manager, I first of all need a s
you can follow this link for manually installing the System Images for emulator, i just installed Android 6.0 (sysimg_x86-23_03) so that i can still render Marshmallow layouts in Eclipse.
These are the sites from where you can download them offline. Mostly you will require Intel x86 System image or Intel x86_64.
First, but on this site every version of System image is most recent so you can download :
Intel x86-23_r0X from here (Revisions are from 03 to 09)
Intel x86_64-23_r0X from here (again, Revisions are from 03 to 09))
Hope i helped those who are looking for solution for older Intel System Images for Android 6.0.