Ethernet Bridging Question

What I have:

I have a rather unique setup I am working on. My goal is to
construct a transparent firewall using an ethernet bridge (Nothing
unique here). However, in the setup I have, only part of the "normal"
ethernet traffic flow arrives at my device. The rest is filtered at a
higer level (in fact bypasses the filter - i.e. not interesting
traffic). In the setup, I have two Gig-E interfaces on the transparent
filter. They are connected to two known Gig-E interfaces. So the
bridge really has nothing it needs to learn I know which device is
connected to which interface.

Question:

Can I "stuff" the ethernet bridge tables to prevent the learning.
Then set the timeout to some really long time to make the startup time
reliable and quick?


Thanks in advance.
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Mark