Attached you will find the dmesg log files from a normal boot.
One dmesg from a boot sequence with a normal debian kernel without xen:
--> Logfile: ("dmesg.2.6.18-5-686-bigmem")
One dmesg from a boot sequence with XEN-Kernel:
--> LogFile: ("dmesg.2.6.18-xen")
Then we've tried it to via command "INSMOD":
With Debian normal: See attachement ("r8169-working.jpg")
And with XEN-Kernel: See attachement ("r8169-NOT-working.jpg")
For all we've used the Kernel 2.6.18.
You will find the whole bunch of Files in the attached ZIP-File: ("XEN3.1_r8169.zip").