You can do this. =) Put this into your option file:
<HTML>
<TITLE>Kit Option</TITLE>
<BODY>
<h3>--cut here--</h3>
<TABLE CELLPADDING="0" CELLSPACING="0">
<TR ALIGN="Left"><TD>
<font size="2">
<INPUT TYPE="radio" NAME = "option|004|%%prodID%%"
VALUE='Power locks|150.00'> Power locks (+$150)<br>
<INPUT TYPE="radio" NAME= "option|005|%%prodID%%"
VALUE='Power windows|150.00'>Power windows (+$150)<br>
<INPUT TYPE="radio" NAME= "option|006|%%prodID%%"
VALUE='Alloy wheels|500.00'>Alloy wheels (+$500)<br>
</TD></TR></font>
</TABLE>
<h3>--cut here--</h3>
</BODY>
</HTML>
This is a basic option file which will do what you want with radio buttons. This is how it works. The INPUT TYPE = radio, that means you want a radio button. You can make these checkboxes if you want. The next important thing is the "004", notice that each option gets a different number. Doesn't matter what they are as long as they're different; this allows the customer to select more than one option. The first part of the VALUE is what you want to show up in the cart and the price. The second part is what you want to show on the screen when the customer is selecting the options. You can add as many options to this as you want, as long as you give each one a new number. The </td></tr></font> all goes at the very end. Sorry it took me so long to respond! You've maybe figured this out on your own by now.