Add custom modpack?

[Ril]

Hello!
I have a question : can we add a custom modpack without deleting one of them?

If it's possible, how can we do it?
Thanks for answers!

 

[Cptqrk]

I'm confused.
Are you speaking of different versions of a specific pack?
Or different packs like Agrarian Skies and TPPI?
If you are using the FTB launcher, you don't need to worry about it.
The only time you would need to delete a mod pack to get another one is if your hard drive is out of space.......