[How do I install more mods?]

This is why I think the old installer system is still superior. You had the option of not installing some mods, freeing up some ID's for mods not in the pack that you choose to play with.

I think if you could use the launcher to update/download the required files, but still create a similar installation to the old installer.jar then you'd have a perfect being.

i agree :)

[Crazy Lag and mod select....]

Thats interesting then. Obviously there's a lot in play that will make looking into this difficult, since everyone has different computers with different specs. Most of the official testers don't get these problems.

hello,

I have been having the same problem and I think it has to do with the launcher,

just the whole "spout" based thing is probably the problem :(