ok, thanks to Chris's help and some dude from Autobarn, i got the alarm working again.
Key On,
Press valet once, and release
Press and HOLD valet
Press 'lock' on viper remote
relase valet
Key Off
gotta be done within 20 seconds apparently.
I may have un-programmed the remote or something, because remote start doesn't work anymore, but i might just have to assign the button to a channel or something.
So all those owners with the same alarm, and if you get this problem when changing a battery, give the above a shot.
cheers!
daniel