If your using MikG rom then go to the site and to the mods and themes section thats where i got mine from. Cause it works for me on MikG 1.03 Rom. Maybe theirs is defferent from this one. Cause i have the orginal and the 3.0 camera. If you want both of them installed just rename it, cause it's just an .apk program.
flashing that zip didn't work for me
so i grabbed the newer HTCCamera.apk (4102 KB in size) out of the zip file
and using root explorer i went to system/app - mount R/W
then deleted the existing HTCCamera.apk
then copied the newer one into /system/app
long press it and click on Permissions
this is what you want ............................. then rebooted and HTC Camera 3.00+