luacs1998

Read your logs or the EAQ.

On the wiki somewhere. You want "Old Versions".

Did you install optifine or anything else like that?

790 is bugged, update

Read the EAQ.

If you're using magic launcher you need to run modded mc at least once through mojang's launcher.

Use the 'hard' instructions.

Update.

Don't use egit, get a proper git client. Try the pahimar workspace setup, I don't use it personally but it seems to be good.

Console tab in the launcher?

Logs?

It will do the downloading for you, you shouldn't have to download anything.

Files is having problems.

Logs?

It's supposed to. It means that a mod used in this world has been removed, blocks may be missing. If you don't mind hit yes.

Don't show us the screen, give us the LOG!

Problem with IC2

Problem with Damage Indicators.

Nope, 1.6 only.

What launcher are you using?

Because thats 20-90MB of redundant data in EVERY download that 90% of users wouldnt need at all Why would 90% of forge users not need these libraries? What changed in forge that there's now an additional 20-90MB of libraries required? I would redownload the libraries every time I updated forge anyway because I would have no idea if there were an added/removed/changed dependency. Of course all this would be moot if there were just a way to run the universal installer on a headless machine. Your distribution model is broken if you require your users to go manually find a copy of libraries you depend on. That's the whole point of using the installer - it does all the updating for you, etc. You can upload the libraries only once, then just update the universal jar. Forge only updates their libraries when mojang does or every major mc update.

Logs?

Why would I need creative tabs on a server? Either use a sided proxy or @SideOnly it.

I would recommend you get in touch with the mod maker.

Install client.