Many thanks for this tutorial, Wild_qwerty. Just what I've been looking for!
I don't want ALL those mods yet, only the second two, so trying to follow your tutorial - with stupid questions.
Up to step 5 or so,
* I need to make shortcuts to Fallout2.exe and rename those to point to the new .cfg/.ini files I just made. Not sure about Megamod yet, but Restoration Project comes with it's own .exe. So which .exe should I use? I suppose I'll use killap's since I don't plan on playing the unmodded game again.
* The RP ddraw.dll is version 1.18.1 while the new one from Timeslip's site is version 1.24.0. Which of these should I use? Does it make any difference?
Thanks again.

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edit: Ok, I have renamed .cfg/.ini files and renamed Data folders for both mods I want to run. RP seems like it's working. Start screen says v1.02 instead of expansion like it should, but the 'rock' is there behind Klint saying it is the expansion. Never played MM, but that looks/starts like a normal game. I thought you could talk to Klint but he says nothing new, so I think it's not working.
The folder you show in the tutorial has separate master/critter.dat files for each mod. I found the .cfg lines to change for different MASTER/CRITTERS.dat but I can't find those files to rename anywhere - only the original ones.
So I'm downloading your easy multiple installer since I can't figure this out. If I use that however, I'll need to find out how to update the mods, when needed, from the individual mod creators.
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edit again:
I installed the MultiMod installer with v1.00 (as I thought killap's RP didn't run with the patched game). Now it won't run because "sfall...Was expecting v1.02US". Can I apply a 1.02 patch now, or should I uninstall the MultiMod installer first? Does the 1.02 need to be official or will killap's patch work?