I think those are from the pre-patched version.The variables for checking if the stats are enough for the frankenhooker and some other options are just initialized when starting a game so they're always 0.
Also, speed has to be 60 for one of the options and i'm not sure there's a way to raise it past 50.
You can just do the following modifications and everything will work as it should - old saves should be just fine.
vampire.rpy: (2 occurences)
Insert:
Before:Code:$ stat_lusts=v_lust+z_lust+w_lust
final.rpy: (can alsochange speed>=50 while you're at it)Code:if stat_lusts>=70:
Insert:
Before:Code:$ stat_lusts_2=v_lust+z_lust+w_lust
Code:menu: "Go through a front window." if speed>=60: jump front_window "Kick down the front door." if strength>=15: jump front_door "Climb up to the open second floor window." if stat_lusts_2>=69: jump second_floor "Maybe I'm just not ready for this...": jump final_quest_fail
the patched version was updated to make it easier.
at this stage, with some people unable to get the achieve, i advise downloading the patch and perhaps starting a new game.
i had also boosted the lusts gains so most peeps should have that amount by pretty much when they're doing this quest, or maybe need to do one or two visits...