/usr/sbin/mylivecd –nodir =^/home/jjb /home/jjb/Downloads/PCL2010.iso
As you are excluding your home directory, did you create a second user to be included on the ISO? I'd recommend using "guest" as the new user. On first boot, after installation the guest account will be removed. You can then start fresh with creating your user account, just as you would do with one of the official release ISOs.
After creating the new user and running bleachbit, try this command ---
mylivecd –nodir =^/home/jjb /home/jjb/DownloadsPCL2010.iso