Need WAYYYY more information than that if you want help fixing the issue.
o) What version are you installing on top of?
o) Are you using the HoB?
o) What is the md5 of the update you're installing?
o) Is that the full error?
Really need to document what you were on when you started and the steps that led you to that error. Then we can try to help fix it.
That's a corrupt zip file indeed. Did you have the House of Bionic push the update to your sdcard-ext or did you manually copy it over? At this point you'll have no choice but to shut the phone off, pull the sdcard, and recopy the update to it. Use something like hashtab to verify the MD5 hash. For the 242 update it should be: 2c3b6dd72991a8860fe26385e503c975