Yesterday i decided to give the new Calamares installer a go on Manjaro XFCE 2015-09-27 to see if dual booting was possible on Windows 7 without having GRUB write to MBR but rather to / and it worked!
Had only created a / and /swap (no extended partitions).
Here are my observations:
-Startup was slow even after second reboot.
-Still have a no go issue with printing from usb connected HP LaserJet 1018.