You can, but for your needs and current and such, the voltage drop (and the heat output) of the L298 is going to be horrendous; at 1 Amp, according to the datasheet (and alluded to by Erdin above ya!) - total drop is close to 5 volts. So - if you used a 12V pack, that would leave 7 volts to the motor, which is too high for a 5 volt motor. Now - if you went with a 9.6 volt pack, that would be much better - leaving you with close to 5 volts for the motor needed (and dumping less voltage through the h-bridge, as heat).
As far as actually "making" such a board - you need to realize that the L298 does not have a standard 0.1 inch pin-spacing pinout. Basically, both sets of pins -are- 0.1 inch between pins, but one row of pins is shifted by 0.05 inch. This makes it nearly impossible to use on a breadboard or standard perfboard.
You can try to bend the pins to fit - it's possible to do - but it's also very easy to break the pins off the IC as well. A better alternative is to get one of these:
http://www.jrhackett.net/L298adapter.shtml
...or - if you still want to assemble it, but gather the parts yourself - he also sells this:
http://www.jrhackett.net/L298brdInfo.shtml
Final note: You -will- need a real heatsink bolted (with heatsink grease/paste) to the L298. The problem is, of course, finding one. I have yet to find where to get the aluminum extrusion profiles (let alone just the heatsinks) the chinese companies use for the L298 Multiwatt15 devices. But you can't skip using one; it is needed, otherwise the chip will go into thermal shutdown when it overheats. So think about what you will use, if you go this route.
Personally, with all of these drawbacks, I would look for a different solution (preferably MOSFET based).
Good luck!
