@GoSharks: thank you!!! i'm so happy, i installed the 5.4.3.2 and after that the jailbreak (i've seen the word **jailbreak**)

can i now delete the files of the jailbreak package from the root of the kindle now,or do i have to leave it there?
now do i have to install kual and koreader,is it correct or is there something that i'm forgetting?
edit: ok forget my request,now i have 2 new folders into the root, rp and mkk!