What options are available to tune network for True Image 2011

I have a storage server and a media server.
They run Windows 7 x86 and Windows 7 X64 respectively.
Both boxes have 2 network interfaces :- 1000BaseT and 10GBaseT.
All 4 interfaces are on the same subnet.
The 1000BaseT interfaces are connected to a switch which carries traffic to the internet router.
The 10GBaseT interfaces are a direct connection between the storage server and the media server.

The plan is to get reasonable bandwith when backing up the media server to the storage server.
This works fine with Windows controlling the transfer.
The windows setup includes:-
all interfaces on a 10.20.40.0/24 subnet
a low metric value set on the 10GBaseT interface for IPv4
Jumbo Frames (9014) enabled
some TCP parameters tuned:-
netsh int tcp set heuristics disabled
netsh int tcp set global rss=enabled
netsh int tcp set global chimney=automatic
netsh int tcp set global netdma=enabled
netsh int tcp set global dca=enabled
netsh int tcp set global autotuninglevel=normal
netsh int tcp set global congestionprovider=ctcp
netsh int tcp set global ecncapability=enabled
netsh int tcp set global timestamps=disabled

This gives me a disk transfer rate which is about 80% of the speed of the slowest disk array (>3Gb/sec)

When True Image 2011 runs (from a bootable USB stick) on the media server to write to the storage server, the bandwidth drops to about 150 Mb/sec.
The most glaring issue is that the traffic travels through the 1000BaseT interfaces and the switch.

True Image 2011 looks like it is Linux based.
Is it possible to get TCP tuning parameters to take effect, either for the installed program or for the bootable version.?