A BlueTooth dongle of range 10mt will cost around 800 and the same with 100mt range will cost around 1800.
You will need a bluetooth (bt) adaptor for ur PC. You have two options:
1. A card that plugs into the PCI slot of a PC and has a external antenna for communication-- cumbersome to use.
2.USB bt adaptors:these tiny devices plug into ur USB port and work as a interface for bt comm with lappy or cellphone.
The advantage of using a USB adaptor is that u can remove it when not needed and plug it into another PC or lappy without any hassle.
These adaptors are rated on the range they cover:a 10 m adaptor will cost rs 1000, where as a adaptor with 100m range will cost u rs1800.
U will need some nokia phone managers like o2 or nokia PC suite.
The windows sp2 has a feature for bluetooth transfer and after u install the drivers, u are ready to go. Whenever u send a file, ur PC will ask if u wanna save the file. So, it's simple.