Unless you have experience with 12volt systems etc, I wouldn't try this on your own. Its not impossible, but not recommended.
And about the Best Buy comments, I'm a certified installer at a Best Buy here in San Antonio.

And yes, some installers suck ***, no matter where you go.
12volts white + ignition harness
Starter black/white + ignition harness
Notes: If doing starter kill, must interrupt the wire between the keyswitch and the fusebox, not between the fusebox and the starter, to keep the check engine light from coming on.
Second Starter N/A
Ignition black/yellow + ignition harness
Second Ignition N/A
Third Ignition N/A
Accessory yellow + ignition harness
Second Accessory white/black + ignition harness
Keysense blue/white - ignition harness
Power Lock black/blue - passenger side fuse box
Notes: in a green 20 pin connector.
Use black/white for lock and green/red for unlock on LX models without factory security. These wires are located in a two pin gray connector by the front of the drivers side fuse box.
Power Unlock orange - passenger side fuse box
Notes: in a green 20 pin connector.
Use black/white for lock and green/red for unlock on LX models without factory security. These wires are located in a two pin gray connector by the front of the drivers side fuse box.
Lock Motor white/red driver side fuse box
Unlock Motor driver side fuse box
Notes: yellow on the EX and lt. green/red on the LX
Parking Lights+ red/black driver side fuse box
Parking Lights- red/yellow steering column
Notes: Only available on the EX model.
Hazards
Turn Signal(L)
Turn Signal(R)
Reverse Light green/black + driver side fuse box
Door Trigger black/white - passenger side fuse box
Notes: In a green 4 pin connector.
Dome Supervision use door trigger
Trunk/Hatch Pin orange - drivers kick panel
Notes: Above the hood release in a gray 18 pin connector. On the DX & LX models, also found in a 2 pin connector behind the drivers fuse box.
Hood Pin yellow/red or yellow - hood pin switch or
Notes: On the EX models it is in a green plug next to the passenger side fuse box. On the LX models it is at the keyless/security unit, if equipped, which is attached to the driver side underdash panel.
Trunk/Hatch Release white/red + drivers kick panel
Power Sliding Door
Factory Alarm Arm
Notes: Arms and disarms with the door locks on the EX models. The LX models arm only with the factory transmitter.
Factory Alarm Disarm
Notes: Arms and disarms with the door locks on the EX models. The LX models arm only with the factory transmitter.
Disarm No Unlock blue -
Notes: On the EX the wire is located at the drivers power window switch, on the LX the wire is at the keyless/security unit which is attached to the drivers underdash panel.
Tachometer blue tach test connector
Notes: The tach test connector is located behind the battery on the 4 cylinder, and on a bracket attached to the drivers side strut tower on the 6 cylinder motor. The tach test connector is a white 2 pin connector, and may be covered by a black rubber boot.
Wait to start
Brake Wire white/black + brake pedal switch
Parking Brake
Horn Trigger lt. green/blue - steering column
Memory Seat 1
Memory Seat 2
Memory Seat 3
Interface Module: Category:
Door Lock Interface Required:
No Type:
Data Bus
Part #: IM-Honda-2
Notes:
Interface Module: Category:
Immobilizer Bypass Required:
Yes Type:
Transponder
Part #: 1100F
Alternate Part1 #: 1100X
Alternate Part2 #: 556HW
Alternate Part3 #: 556UW
Alternate Part4 #: DesignTech 20402
Alternate Part5 #: DesignTech 29402
Notes: When using the 1100F or 1100X, a software change to 1100HA is needed.
Straight from DirectTechs.
I installed a Viper 791xv in my Accord.
I used my Valet key in the 556u bypass module to bypass the Honda Immobilizer.
If you do undertake this, do not hesitate to ask me questions. I'll try my best to walk you through it.
-Andy
Oh, I'm known as GhettoBuddha on most other forums. lol.