Which part of the bomb do you need help with?
I'm up to the last operation you've gotta do.

First...transfer water from the tank on the right when you have zoomed in
-then zoom in to check the temperature and apply gel until the gauges are completely cool
-zoom in again to transfer water as before
-zoom in and remove the all the detonators from the explosives
-check temperatures and cool again
-zoom into panel at top of the screen and follow the coloured lines to the
explosives...destroying the chips on the board with the laser that are linked to them (you
may have to zoom in and out a few times to get a better view)...

-the rest os easy and self explanatory-Good Luck ;-)