vlue99 - no need to root the tablet before installing CM7.
It can be done from any stock firmware, with default user privileges. Just follow the detailed install guide in the other thread.
Seems you got stuck on a boot loop. Easiest way to fix it would be to do a factory firmware install - hold down 'volume down' button, press power on, have the stock firmware on the SD card and install it.
Will wipe out all of CM7; if you want to install it afterwards, follow the guide from scratch; do not forget to wipe user data, cache and dalvik cache as mentioned in the guide.
I held down volume Up button then pressed power on. I was able to go through the process following your guide. This time it worked perfectly. I didn't update to the latest firmware. My wifi is working fine with the stock firmware.
My le pan is rejuvenated now. Gingerbread opened up many new features.. more than I need for now.
I can wait few more month until nexus 7 drop below $150.