This is tricky. USB to Serial convertors will not work here. In order to communicate with your usb programmer, you'll need a usb host. If your laptop has a pcmcia slot, it'll be much easier to get a pcmcia usb card.
Another solution is to open up your programmer and check if it is using a usb-to-serial convertor like pl2303 or ft232 chips. You can directly tap out the serial signals.
Dear PicBlaster, I like to know the site you found some circuits for USB to RS232. You may write to email: thixxxx@sltnet.lk / xxxx@gmail.com MOD: Your mail ID is removed. If you expect every member to contact you through your mail ID, why you have joiined the forum? Forum is open for all. You may share anything in open. Next time i see you asking anyone to mail you, you'll get a warning.