Archive of the former Yahoo!Groups mailing list: Homebrew PCBs

Yes, it is possible. You can use a heat gun. There is another method, that requires only soldering iron,
but I never tried it.  They say it works with SO8 packages.

Use a thin material for PCB. 1 mm is the maximum. Drill a hole in the center of the thermal pad. Put some solder on the PCB pad AND on the IC pad. Solder pins as usual. Use a thin tip with flat end for your soldering iron. Inject some solder into the hole and heat it there. The solder will be sucked into the gap between the IC and the PCB due to surface tension. This method is not as good as using an oven, but it is simple.