I managed make the ruuveal but i cant get the "newzip"HTC Butterfly

[herowudi]

I used 64bit kyrin ubuntu,when i try to make unruu,it mentioned me i should have libunshield but when i try to install it ,i got "Package libunshield is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source
However the following packages replace it:
libunshield0:i386 libunshield0
"
i manged to install what it said then i made it ,it always said i should have libunshield,then i give up this.
However,ruuveal is being installed successfully so i used it to ruuveal the rom i get in the way of opening ruu in windows then check the Taskmgr and find the path that had rom.zip. but when i try to ruuveal,it said
ruuveal

Invalid zip file - aborting!
failed to decrypt zip file!

i just want a low ver. hboot,then i try to bruutveal.BUT!! I STILL GET THAT:

bruutveal

failed to open hboot: No such file or directory

WHAT SHOULD I DOOOOOOOOOOO!!!!!!!!!!!!!!!I GONNA BE CREAZY!!