First- the CWM 'app' you got from the market does nothing (that anyone here is doing). Uninstall and move on.
Second- CWM replaces your stock Lenovo Recovery 'BIOS', so when you boot to recovery mode, you'll see a top hat icon and lots of new options. You won't use Lenovo's anymore.
Third- Get your TPT's appropriate CWM image here
(to be installed using ADB commands from your computer) downloaded to your PC
Fourth- follow these instructions (copied from here
) to use ADB to install CWM Recovery into the recovery partition, replacing Lenovo's.
open command line and go to folder where the file is saved
> adb push NameOfCWMFile.img /data/local/
> adb shell
> mount -o rw,remount /system
> echo "#!/system/bin/sh" > /system/etc/install-recovery.sh
> dd if=/data/local/NameOfCWMFile.img of=/dev/block/mmcblk0p1
Shut down your tablet. Boot into Recovery (vol+, vol+, etc.). Using CWM options, choose reboot (this should clear a possible reboot issue while inside CWM).
Done - now you can...
'Backup' - create a Nandroid on your external SD-Card-- DO THIS FIRST!
'Restore' - install any other TPT nandroids (no-bloat_0089_US for example)
'Install image from SD-Card' - install CM9 (Ice Cream Sandwich)
...and much more