You can root Smart Tab 8 and Smart tab 10 by following the method of rooting used by Ainol Novo 7 Crystal as it uses the same Chipset and is running JB 4.1.1 and almost all the specs are the same too.
Download the Crystal_Root.zip from attachments and copy it to a microSD card (do NOT extract it)
Charge up the battery in your Crystal, Power Off and remove the charger cable.
Insert the microSD card into your Crystal
Get into Recovery mode.
In the recovery you can move with the Volume- button, you can select with Power or Volume+
Select the apply update from EXT option
Select the Crystal_Root.zip, this will install the package
Wait for the update to finish
Select reboot system now
Follow the instructions properly and it should work.