I tried creating a cert with custom curve parameters here: http://dpaste.com/1Q2MYWF
It seems the parameter block is all part of "Subject Public Key Info". The signature is just a binary blob at the bottom. But openssl doesn't really break that down, does this signature have its internal encoding that allows supplying additional parameters?
And if that's the case: How does that make any sense? It sounds like just asking for trouble. (I mean... there never can be a situation where the parameters of the signature do not match the parameters of the key.)
