How do i install a bluetooth chip in a dell inspiron e1505?

Yes there is a such thing as a Bluetooth 'Chip'.
'Chip' is a slang term for Integrated Circuit, or IC.

This is an old list made in 2002,

http://www.palowireless.com/database/btchipsets.asp

Basic examples of a few IC's used in a personal computer are,
1.Processor
2.Northbridge chipset
3.Southbridge chipset
4.GPU, (Graphics Processing Unit)
5.Bluetooth IC.

Just a few.

The Bluetooth 'chip' can be installed as an Integrated Chipset, by soldering directly to the motherboard, or it may be installed on a separate circuit board, (Module), such as used on the Dell Inspiron E1505.

A user has the choice to order the Inspiron E1505 with, or without, the Bluetooth module.

To install a Bluetooth module:

1.First,
I would like you to use the link below, to view the Service Manual for the Dell Inspiron 6400/E1505 Notebook PC, from Dell Support,

http://support.dell.com/support/edocs/systems/ins6400/en/sm/index.htm

(If you wish you could bookmark the link, and have the Service Manual at your fingertips)

Now scrolling through the list, come down the Left hand column to
=> Internal Card with Bluetooth Wireless Technology, and click on it.

2.If the AC adapter, (Charger), is plugged in, unplug it. (From the surge protector first, then the laptop)
Now remove the Battery.

3.At this point you are advised to wear an ESD Wrist st-rap, and have the alligator clip connected to a good ground source.
ESD. Electro Static Discharge.

Your body carries Static electricity. Static can fry out the delicate hardware components in a personal computer, in a Split Second!
It is for this reason that standard advice is given to wear the above anti-static device.
Also to Never work Directly on a carpet floor, a couch, or a bed. Work on a table.

An ESD Wrist St-rap doesn't cost very much. Usually around $6.
Cheap insurance against Static burnout of your laptop.
These can be found online, or at most stores that carry computer components.

Barring, that it is not feasible for you to purchase one at this time, I'll offer alternative methods.

A.Touch the metal frame, of an open empty desktop computer case, while the case is sitting on the table where you're working, before you open the laptop, and open the packaging for the Bluetooth module.

B.Touch a large metal knick-knack, that is placed on the tabletop's working surface. (Metal statue? Metal plate used as wall hanging?)

The above is Not professional advice, but I base it on, it's better than using no anti-static precautions, or measures.

4.On the link above view => Replacing the card

A.The Item shown as 1. is the Card Door.
Dell recommends using a plastic scribe to pry the door off.

(You are viewing the Battery compartment, with the Battery removed)
You pop it loose at the Top. Pry out at the top, the door comes up, and out.

B.Connect the Bluetooth module to the cable connector, shown as Item 2.

C.Align the Bluetooth module with the compartment on the side, then place the module in.

D.Slide the Card Door alignment tab, into the slot at the bottom, snap the top into place.

There is no such thing as a "bluetooth chip".