emusonacid! legacy

Hi team,
just joined in, coming from the EIII Forum.. I have 2 puzzlers that would make a great help if solved..

1-About e-mu series IV :
does anyone know if extension cards are compliant so I could say gor instance,
. take a RAM extension card from an E6400 and plug into an Emulator IV K,
. take a 128 voice card from the EIV K and plug into the E6400 ?
Might be obvious, but I don't know if E-mu extensions are standard

2-About MPS Keyborad :
As my E-mu MPS keyboard is starting to weaken, and repair is not obvious (Technics keyboard, E-mu circuits bed), I would like to know if there is a way to retrieve an E-mu MPS sound library to another E-mu sampler (I have the EIII, E6400Ultra, and E4K-4.10 available in the studio), for instance from smartest to manual options :
- unplug the MPS Eprom and plug in back into the Exx (EIII, E6400Ultra, E4K), but even if this works, most of the sound quality comes from the MPS FX ..
- retrieve via a sequencer the samples, presets, performances and reinject into other Exx, or parts and rebuild performances after transfer for instance
- combinaison of some operations via the different Exx available ?
- else ?
- sample the sounds..
I mean after all, the sounds were made from an EIII to burn the Eprom, and apart from the MPS FX, which seem to be of same origin of the E4 FX anyway, there is no particular specificity I guess, or maybe it's in the architecture ?

Thanks a lot.

1a: RAM no problem, both rely on 72 pin SIMMS, compatible.
1b: I was sceptical at first (i.e. thinking the EIV k board has special size/layout, BUT found an original brochure saying it's standard, OPTION 6910 so for "E4K, EIV,e-6400 or E4X", "Easy installation using internal connector"

2: Sometimes you like things so much for a reason, but I claim there's no way to do this. Guess you find each exact sound (or better samples at least, dunno maybe the waveform sounds were special Proteus/MPS) in the EIIIX/EIV library, even better, larger banks, thus better loops instead of these all in 4 MB squeezed Rom I seem to remember standard MPS came with, MPS I guess first introduced E-mu FX once and it + Ultra still rely both on these (even same FX ?) A/B effects/busses, right ? Some preset "might" be special on the MPS, I would claim I'd rebuilt them as good as possible on the Ultra (might take a moment). Too much of a hassle (?), buy another MPS.

EDIT: Sorry for my complicated sentences I notice again, I try to do better