Reverse tethering!

anyone with any idea? basically this is my situation. my company has limited wireless access and only put my laptop's wireless MAC address as part of a safelist to access internet. so my iphone can't surf wireless. PLUS there's no GPRS/EDGE/3G connection or a proper signal.

i know how we can tether using our iphones for the pc

but is there anyway we can do it backwards? as in my pc has wireless and i want it to 'wireless hotspot' my iphone.

note that i only have iphone and my laptop. no other wireless usb adaptors