Mechanical click went crazy, how can I disable it?

Hi, I have a white macbook A1181.

The mechanical click has been too oversensitive for some months but now it's completely nuts, it acts of its own by barely touching it, and acts at a very high speed, so it makes the computer unusable as it drags and opens everything at a very high rate (for example, let's say the cursor was over some file in finder, it would open like 10 times in less than a second, I'm not exaggerating).

I read it's caused by batteries bulging, but I recently replaced the battery and still the same problem. Even without battery it acts of it own. I'd like to use only the trackpad portion, use tap to click because right now it's a %#*@ nightmare to use and I don't want to buy a new top case (I live in a inconvenient place to order these things and money becomes an issue).

I don't see a guide in this website to remove the mechanical click while leaving everything else (trackpad) in working state. I tried many tricks, blowing air, using paper to remove dust and other elements but it hasn't worked. If I need to take it out so be it, be please direct me in doing so.

Any help would be appreciated