Just get magic launcher or my craft. They are both good mod managersBut yeah, having to continually reinstall mods is goddam annoying.
With these you don't have to edit the jar just put to mods in the specific folder and BAM you have to necessary mods that you need. I guess you still have to download the mods but its better than nothing
Thats a good tactic.
I LIKE IT and shall use it now