No, no, and no terrible idea imo. In lieu of hacking up your wiring harness have the PCM tuned to command higher pressures. This will not fix anything that's failing in the trans, but it might make it last longer.
If you want to beef up the trans itself you might try a real shift kit, replace some parts in the valve body, flush the bastard and change the filter.
One of the more involved shift kits like the Transgo HD2 kits, will shore up most of the engineering problems and make the trans a lot more durable. Unfortunately if it's slipping no shop will touch it, so you'll have to do it yourself.
There are places that have better prices, but Summit carries the kit for around 80$
Even then, if the clutches are damaged enough it'll still fail eventually. Is this a soft shift, or is it flaring and slipping up when it shifts?
I'd have a look at the fluid, if it's clear, read, and sweet smelling I'd say it might be worth a try for the money. Only if you do the labor yourself though. If it's even slightly brown, or opaque, or burnt smelling I'd leave it alone and then rebuild it.