Every single post I've read states the same thing but neglects to tell you what to do after running the .bat file.
I was just left with a prompt and nothing changed on the tablet.
I discovered (for TWRP) that I needed to:
1. Download the img from TeamWIn: http://teamw.in/project/twrp2/
2. Get root access and run a command as follows:
root@android> dd if=/sdcard/openrecovery-twrp-126.96.36.199-awifi.img of=/dev/block/platform/msm_sdcc.1/by-name/recovery
Strangely I had to run a terminal on the tablet to boot into recovery by doing
# system/bin/reboot recovery