MTK6592 / MTK6582 / MTK6575 / MTK6577 / MTK6589 ADB VCOM PDAnet Drivers!
The first step to rooting your MTK6589 phone or installing a new ROM or recovery is getting the ADB VCOM drivers installed properly.
Gizbeat put up a tutorial half a year back about PDAnet drivers for your MediaTek / MTK 6575 / MTK6577 smartphones. Now PDAnet ADB drivers will work with your MTK6589 phone as well.
Except for the auto-root link in step #9 for Android ICS, the same tutorial still applies for MTK6589 phones.