Linux support for using phones as modems is a little spotty, but have you tried just plugging it in? On puppy, if it's recognised, it should show up as a broadband device in the connection script.
Your next best bet would probably be to find someone running Linux Mint who can plug it in and test it for you. Mint is about the best I've seen recently in terms of having up-to-date hardware drivers. Puppy tends to lag behind a ways. If it works on Mint or similar, then we can probably figure out from there which drivers are necessary to add to your Puppy install.
Now, all this is assuming that you have to plug your computer into the phone to make it work. I'm not up on the latest phones, but the 5230 is an I-Phone imitator. It's quite possible that it is capable of going into "hotspot mode" and broadcasting a wireless network for you to connect to. In that case, all you have to do, assuming you have a wireless card in your machine, is open the connect script and point it at the wireless. If you don't have a wireless device, you can get USB wireless cards for as little as $3 when they come on sale. Check newegg.
So, basically, plug it in. If it doesn't work, look in the manual for anything about wireless hotspots. If there isn't anything, plug it into a linux machine with cutting-edge hardware drivers. If it still doesn't work, you may be out of luck for a while. Feel free to change the order of the suggestions to whatever is most convenient.