Fertilizer: OK, I've found a fix for the AlienLife crash -- there's a missing dependency on pyHightech either in AlienLife or one of the mods it depends on. So now I've seen its fertilizer. The main problem was different spelling of the names ("fertiliser" vs. "fertilizer"), which I solved by migrating our recipes/items/tech. However, there's a problem with unlocking the recipe: BI has a complete tech named "Fertilizer", which unlocks several recipes and is the gateway to our bio-tech. Also, the fertilizer icon is used in the icons of some recipes using fertilizer. So I'd rather overwrite the fertilizer icon with that of BI, and remove the fertilizer unlock from PyAlienLife's "Biotechnology Stage 1". However, I'm not sure if that would make it impossible to craft Py recipes. It didn't look that way, but then again, I don't really know the Py mods.
Coal Processing: I think I could give that up and remove the unlocks to "Raw Coal 1-3" from PyRawOres or "Coal Processing 1-3" from PyCoalProcessing (fallback if PyRawOres isn't active).
Biorecactor: Nope, I wouldn't touch it even with a long stick -- it's got fluid boxes! :-D
Liquid air/nitrogen: Will use the Py version if it exists.
So, what's your opinion?