I had the r3 hostkit running as a dll with full host support... in fact, I was able to execute R3 scripts from within R2 :-)
obviously there was no sharing of info, only exchange of string data
so I'd use load/mold on the string from/to R3 ...
Are you answering the question?
I'm just saying that with the hostkit, you can execute or setup evaluating whatever you want however you want.
florin: yes, it's possible to include embedded modules or embedded extensions with R3. but it's not documented how to do so, at the moment, so you'll have to dig through the sources yourself.
for embedded modules, it could be as simple as dropping your module in src/mezz/, including its filename in src/mezz/boot-files.r and doing a full rebuild (including `prep`) after that. didn't try yet, though.