static NAT configuration?

OK, I will preface this question with the disclaimer that I know it's weird, but I'd like to find a workaround to this configuration using RRAS/NAT if I can.  My alterative is to completely re-address one of the racks, which I would like to avoid if at all possible because it will be a logistical nightmare.

I have the following setup....

a bunch of servers in Rack 1, on backup network 192.168.10.0/22.  

Server1 = 192.168.10.1/22,   Server2=192.168.10.2/22,   Server3=192.168.10.3/22 (you get the idea).  About 20 servers in all

servers in rack 2, also on backup network 192.168.10.0/22 - but a DIFFERENT 192.168.10.0/22 than rack 1.  Seperate switch and everything.  The two racks do NOT see each other over this backup network.

Server1 = 192.168.10.1/22,   Server2=192.168.10.2/22,   Server3=192.168.10.3/22 (Same as Rack1).  About 20 servers in all again.



Both of these racks are directly attached to a backup media server via Infiniband, which contains an LTO5 tape drive, to which I would like to back up BOTH of these racks.  All of the servers within a rack are connected to the same Infiniband switch, the Media server is plugged in to the same IB switch - one in each rack.  Yes, I know both racks have the same IP scheme, and No they cannot be combined or see each other in any way.  I was hoping Windows RRAS NAT could 'mask' the IP addresses of one of the racks using NAT so that I don't have to re-address everything in one of the racks.  Otherwise, if I tell my backup software to backup 19.2168.10.1, it's not going to know which interface to route the traffic over since 2 interfaces see the same subnet.  BUT if NAT can make the server think that 192.168.10.1 is really 192.168.10.100, then there's no conflict.

is this something that can be handled with RRAS NAT?

Many thanks in advance for any suggestions.