You can edit the main thread and include them as long as they're detailed enough, but you can't bump this way. You have to wait 4, yes FOUR hours between bumps.
Do not forget you can make your own Vouches thread as well, just make sure you do not require a vouch in any way as that is against the rules. You can mention that leaving one is greatly appreciated but not required - kind of like leaving a tip at a restaurant. The couches thread can be out next to your join date and post count if you set it up that way.
If you have any questions feel free to PM me.
-Seph