I have read this thread and it does not help me mount and install both Nitdroid and Gingerbread on one parititon so in otherwords without partitioning anything, I have tried myself but If I mount say /home /android and try to extract and install I run into two things.
Number1: Either install and extract overwrites the previous Android OS.
Number2:The kernals can only be mounted and installed /and and again the problem of over writing each other

I am struggling to find a way to do this without backing up and repartitioning the flash storage.