I'm wondering when Mr. House does that upgrade.

Higly doubtful the force fields in the 38 basemant are probably just a special textured wall rather than the specialy coded ones used in OWB theres no reason to suspect they modify them and its easily explained away lore wise as Houses shields being outside the emmiters frequency range.

I wouldn't think so, I was doing the HELIOS 1 mission and tried to shut down the force fields surrounding the Securitrons, because I needed scrap metal, however I found it was impossible.

No you can't it only works on forcefields within the big empty, you can in fact comment to Dr. 8. "To bad it only works on forcefields around here"