If the MB-SID wavetable could control all SID regsiters with each step, then you could quite easily turn a subset of the SID register dump into a MB-SID patch, just like HardSID... the only tricky bit would be finding the exact start and end of the desired sound... and even then it might not capture note-relative differences... i.e. maybe the filter cutoff varies with note pitch, etc. Anything that might be different depending on what note is played is not going to be captured correctly.
But again this assumes you could play back all SID registers. MB-SID's wavetable can only control three CCs. You could make a very similar sounding MB-SID patch by using envelopes and LFOs to modulate the pitch, pulse width and filter cutoff, but turning a set of discrete register values back into envelopes and LFOs is non-trivial ;)
What might be reasonably easy to do is write more perl script converters that can output the data a little more like MB-SID parameters, so the user can at least have a look, and manually set up the LFOs and envelopes.
One strange thought though: SID files get played back at ~60 Hz whereas the MB-SID can update at 1220 Hz! So even if you get the envelope and LFO waveforms to match, MB-SID is going to produce smoother modulation - any "sample and hold" artifacts from a ~60 Hz update will be lost, unless you also add in S&H ;)
Am I just dreaming to want to be able to play back the exact sounds of "The Last Ninja" or "Cobra" in my own compostion via midi? Is it all too hard??
Not too hard, just hard.
The SID register dump is in hex and it doesn't expand each SID registers into its component bits, i.e. the column labelled "WF" (short for waveform) shows SID register "Control Reg" (refer to SID datasheet) - the "4" is pulse width waveform bit, the "1" is gate bit.
This could be translated into more MB-SID friendly values, I agree ;)
But don't wait around for someone to do that for you... check out the SID datasheet
which describes all the registers and what they do... learn hex numbers and decypher the "Cobra" sound yourself.