Ok so I jailbroke my Ipod and have Cydia.. I read a blog on here that with installer and termv100 I can manually reboot my ipod? If so can I re jailbreak for installer without affecting my other jailbroken stuff?

The reason I have to reboot is because the applications downloaded from cydia won't show up unless I reboot correct? Or am I doing something wrong? (sry Im new at this stuff) Help would be greatly appreciated!!!