As far as I know, your 1700+ is a Palomino as is my 1600+, so you can use the same procedure I did to OC. I have my 1600+ (Which is really a 1402 MHz CPU) overclocked to 1570 MHz with the FSB set to 150 MHz. I can go higher, but I am not stable.
First, let's make sure you have proper cooling. What Heatsink / Fan combo are you using? I use the Thermaltake Volcano 11+ Xaser Edition, and I run a constant 31~C. Do you have a way to read your system & Processor temperatures? It is EXTREMELY easy to fry your CPU, so cooling and Temperature monitoring is a must!
If you have a good aftermarket Cooler, then you want to go into your BIOS at boot, and look for a field that says "Hardware monitoring & Setup", or "System Setup" or something to those effects. Once you find the right field, it will have CPU temps (If your board supports them), fan speeds and a setting for FSB (Front Side Bus). Since the 1700+ CPU is locked, this is the only way to overclock it unless you want to get really serious and modify the CPU itself, but for that you need someone who knows more than me, and you are risking frying the CPU even more.
Once you have found the FSB settings, slowly turn it up (From 133 MHz to say 136 MHz at first) a few MHz and reboot. Make sure the system is running stable. I use Fresh Diagnose to run a benchmark on CPU to see stability. (Free program at www.freshdevices.com) and then I use GCPUID program to see the new speed. I wouldn't go much over 148-150 MHz FSB, or you will just run into problems on a locked chip.
Now, if your BIOS allows you to, you can also tweak the vcore setting up a bit, to increase voltage to the core of the CPU to support the higher speed. Just go up a tiny bit at a time also until you find it is running stable.
Remember! By Overclocking the FSB, you are also putting a strain on your Video Card (AGP port speed is increased) as well as your Memory. And this means everything is going to get hotter, and in turn, heat up your case. So make sure to watch ALL temperatures including your CPU! Memory heatsinks and plenty of cooling never hurt! I run a total of 15 cooling fans in my case. 1 on CPU, 1 on Co-Processor, 1 on Video Card, 2 on memory, 1 on each hard drive w/ heatsinks and 8 case fans including the power supply dual fans. And I still get nervous! I also have an LCD display with case temp and CPU temp on front of case, and I run a monitoring program with an alarm. After I fried 2 CPU's by "playing around", I learned that the key to PC life is getting rid of heat!
Good luck and feel free to ask more questions. There are some awesome people here with tons of know how. I learned how to OC here too, the right way!
