It's fairly straight-forward but gets pretty involved (you really should get a manual) and it can be a little messy - doing this on a near-empty tank will help.
First, you need to "purge" the fuel line of any gas: pull out the fuel pump fuse (2nd one down in the left row), run the motor til it stops, then crank the motor for a couple more seconds to eliminate any residual gas. Make sure to turn off the ignition, and disconnect the battery just to be safe, although I skipped that part. Disconnect the fuel line by pushing up the chrome sleeve while pulling down on the fuel hose - you might want to have a rag handy in case any gas comes dripping out. Now loosen your console, disconnect wire bundles, vent hose, etc, and then completely remove console and lay aside.
You can now remove your seat if you haven't already. Loosen but don't remove the front tank hold-down bolt, remove the rear tank hold-down bolt, then lift up the rear of the tank and stuff something under it to keep it up in the air. Now siphon out what gas remains in the front left and right sides of the tank. Locate the fuel gauge wire and try to wiggle it free from under the tank tunnel so that you can access the connector. There's a little tab on one side you need to lift so that you can separate the connector.
Now comes the messy part - there's probably still a quantity of gas left in the tank, and it's all going to come spilling out when you cut/disconnect the fuel crossover line. If you have a small vise-grips or even a C clamp, clamp it tightly to one side of the x-over line. Get a cup or can, cut or disconnect the x-over line and be ready to catch the fuel as it comes out. When that side has finished draining, loosen the clamp and drain the other side. You can now remove the front tank bolt and lift off the tank.
That should just about cover it - I may have forgotten a detail here or there, but you should be able to figure it out on your own. As mentioned earlier, a manual is highly recommended. Good luck.