tadpoles is correct. There is really no way outside of CPU/GPU to mine scrypt based coins.
Scrypt was originally designed for tar backups and database encryption to be resistant to brute force attacks. This was accomplished by using a memory intensive encryption algo.
The old BFL hardware is really just re-branded FPGA systems and are not memory efficient. This is not to say that someday an ASIC for scrypt will not be made.
In fact, the only reason scrypt based coins can be mined on GPU, is because the scrypt parameters used are pretty weak.
However even with the relative weakness of scrypt parameters used, it is still a foreign encryption algo to BFL hardware and thus cannot be mined with it.
There are some good SHA_256 alt-coins that can be mined with BFL hardware(At least in theory..Never looked too deep into it) as they use the same encryption algo as Bitcoin.