[Q] Replacing lockscreen mechanism

I am using MIUI GB rom and I hate the fact that there is no way of disabling a slide-lock when using pattern lock. This means each time I unlock the phone, I have to unlock two screenlocks.

I was wondering if it is possible to replace the lockscreen mechanism built into the MIUI GB rom with the one from CM7 GB rom, and if so, what files do I need to replace?