Ok some partial success. The drivers are ok on the older kernels, which was used in v.1.4.1.
Here is a possible way to get the card going:
Download and extract the VHD version of v.2.0.5 (It uses the older kernel)
Convert the VHD to RAW disk image format. It should create a 64GB disk image.
Write the RAW image to HDD. It will take a long time with DD and Win Disk Imager, so if you have something better use that.
Once the system is up and running, download the bypass e1000bp.ko driver.
Save it in /tce/packages/click/
Edit /opt/bootsync.sh and add the following lines just before the bootlocal line:
install -D -m 644 /mnt/sda1/tce/packages/click/e1000bp.ko /lib/modules/3.0.21-tinycore/kernel/drivers/net/e1000bp/e1000bp.ko
insmod /mnt/sda1/tce/packages/click/e1000bp.ko
modprobe e1000bp BPoff=1
After a reboot or entering these commands in manually as root (sudo), if 'ifconfig -a' then produces some additional interfaces then we are in luck and can then check that the bypass is off and then edit /tce/etc/mactab with the correct lan0/wan0 addresses.