Question: How to install finite liquid v4 with industrial craft?

You should give us the error report on the black screen.

I personally use a .bat that lets me save the error log even if the minecraft window closes, although there are probably some sorts of logs in ModLoader folder or something.

Not sure if I am allowed to post contents of said .bat, as I found it on #risucraft. You can ask there, anyway.

I think that are not enough terrain sprites left when you install Industrialcraft.
So you need Minecraft Extendet (and I would install ID resolver too)
Try this order:

Modloader
Modloader Mp
Lahwran´s GuiAPI (for ID Resolver)
PReader (FiniteLiquid need that)
Minecraft Extendet
ID Resolver (Minecarft Extendet Version) <--- !!!
Industrialcraft
Finite Liquid

When you then start MC there should be a windows that say id xxx is already in use by xxx or something like that.
Only click on "automatically assign an ID to all"
if testet it today and its work fine (+Nature Overhaul +Recipe Book +Buildcraft)

I tried installing the above method (dropping each into the .jar renamed to a .zip) and got a black screen with minecraft extended (appears not to work with 1.8.1) then tried putting that into my mod folder and just doing the finite install. still getting a major crash with finite.

Has anyone got IC + Finite running in 1.8.1? if so, how?

lol this was written for 1.7.3 ...
FinLiq v5 + IC² ? installing it together ? would be epic
Challenge accepted

5 classfile conflicts
*open mcp*