I really want the Millenaire mod, could anyone make a video or something that shows how to install it? Mo' Creatures too, actually since I have no idea how to install separate mods to the FTB launcher..
May not be able to do a video, but I could give you a rough guide with pics, just gimmie a minute to collect the relevant things.
[ETA]
Okay, I've gotten the pics uploaded, so let's get crackin!
Step 1: Fairly obvious, locate the mod you want to install, and download it. Make sure the mod is Forge compatible, or that you've got the necessary prerequisite mods installed first!
Step 2: Make a home for your extra mods, something that's easy to navigate to and remember. For this example, I used "Extra FTB Mods."
Step 3: Start up the FTB Launcher, select the pack you wish to modify (I chose Direwolf20), and hit the "Edit Mod Pack" button.
Step 4: Hit the "Add Mod" button at the bottom right of the window that popped up, and navigate to your mod folder. Select your mod, and hit "Open."
Step 5: Look at the list on the left, and confirm that your mod's been added to it. While not strictly necessary, I find it to be good practice to make sure that everything's where it ought to be before committing.
Once you've done all that, close the window, and start up your mod pack like normal.