Dunny advice

Hi i am after some advice on what to do with my toilet.The toilet is in a highset house and appears to be held in with four screws into the tiles (cement then chipboard under tiles?) and then attached to the pipe out the back with the wax ring .2 of the screws on the left side cant be tightened and so the toilet can rock back and forth when your on it (very annoying!)Long term i want the floor knocked out and new tiles/toilet in but for now i just want it serviceable.Is there anyway to secure it without removing the toilet such as long screws drilled into where the loose screws are?Worst case could i take the toilet up and put some tile glue or similar on the base of the toilet and glue it to the tiles and put in some new expanding fastners?My only worry is the wax ring thingo on the pipe out the back.Are these hard to remove and how are they secured to the pipe?Attached are 5 photos of my "crappy" toilet :rolleyes:
Any help or ideas appreciated.

http://www.users.bigpond.net.au/groverj/1.jpg
http://www.users.bigpond.net.au/groverj/2.jpg

http://www.users.bigpond.net.au/groverj/3.jpg
http://www.users.bigpond.net.au/groverj/4.jpg


http://www.users.bigpond.net.au/groverj/5.jpg

Your toilet looks perfectly OK, although that silicone (or wax) is not the way its done anymore. The screws look as if they need replacing but the holes in the wooden subfloor are probably enlarged due to moisture and/or movement of the bowl over a period of time. I would first of all try longer screws. Try to use stainless, and be careful not to crack the base as you tighten them, use those nylon washers. If that doesn't work, for a temporary fix I would go through the subfloor and use suitable nut/washer/bolts. While the bowl is loose, scrape all the stuff off the floor and bowl and then squeeze some bathroom sealant under it all along the bottom edge. But in the long term you will probably need to replace the flooring under the bowl.