The title says it all i want to know if there is a way to install compiled mods e.g. NEI in my dev environment. I have spent about an hour searching but i cant find any info on this topic.

If you wanna just have these mods run in dev environment, place them into 'mods' folder. It's usually created at the project root. Look where 'saves' subfolder is created. Basically, devel Forge repeats most part of standard profile structure.

If you wanna debug and code against several mods, it gets a bit more complicated.

First, you'll need mod sources, of course.

Next , you'll need to add these sources, including mod's assets, to the project.

For ordinary mod, that should be enough.

For coremod, you'll need to place stub loader jar into mods folder. Try check JAR file of the mod you're interested, extract METADATA folder from there and then re-pack it, so the new archive would look like old one, but contain only Java metadata. This JAR is required for Forge to recognize coremod and load it properly.

If you install CodeChickenCore, too, you can use any obfuscated mods just fine.

 

Thanks i tried that a few weeks ago but it just crashed on start up.