[22_12_2012]

Ok, after a few hours of trouble I managed to install windows XP.

Here are the steps:

Double check your hardware from Vista, like your chipset, gpu, audio and the rest, even though at this point they might all be the same.

Make sure you have a Windows XP cd with at least SP2, I recommend SP3, so that you dont get those BSOD while installing.

When booting, press F2 and get into the bios and change the HDD to ATA.

Boot with the Windows XP cd, partiton and install as desired.

After the installation you will have a bunch of yellow questionmarks in the device manager.

First off, install the MCP79 chipset drivers, which are on the Dell website and also seem to work. The following will be installed: SMBUS, SMU, and the HD Audio driver. If you have problems with this, than install the drivers from http://www.station-drivers.com/telec...ivers.com).ZIP


Second, you want the video drivers. The best for this is http://www.laptopvideo2go.com/. Grab a copy of the latest v185.20 Nvidia drivers from http://www.laptopvideo2go.com/nvidia...ries/18520.exe.
While here, grab also a copy of the latest Atheros drivers which we will need for the Wireless install. http://files.laptopvideo2go.com/wlan...v7.6.1.221.exe
Install the video drivers through the Device Manager-->Video Controller--->Update driver--->Select location...etc.

Third, the audio drivers. Just because you installed the Nvidia HD audio, it does not mean the sound will work. You will need the IDT 92HD73C1 Audio drivers. Grab them from: http://rapidshare.com/files/190141494/PIDT001.zip
Install either way, through setup or Device manager.

Fourth, Wireless. This is a bit tricky. Mainly because you cant just search for the Dell 1515 drivers, you have to find the chipset of the card. Anyway, the chipset is AR928X. So, unzip those atheros drivers we got from www.laptopvideo2go.com. Then go to Device manager, Right Click your Wireless Device (or Network Device) and Update Driver, Select No to search for internet updates, Press Next, Select Install from a Specific Location (advanced) and press next, Click Don’t search. I will choose the driver to install, and press Next, Click Have Disk and the Browse, Locate Driver folder, then go to Drivers and scroll to find the AR928X driver and press Open, Press Ok and install the Driver. It will ask you if you want to install, not certified, etc, don't worry, just install and it will work.

Webcam install from the dell website, choosing the XPS 13 vista drivers.

Ricoh Card drivers install from the dell website, choosing the XPS 13 vista drivers.

Touchpad install from the dell website, choosing the XPS 13 vista drivers.

IR Receiver (ITECIR) install from the dell website, choosing the XPS 13 vista drivers and restart.

Ethernet also from dell website, choosing the XPS 13 vista drivers.

Bluetooth (370), is a bit tricky as well. It will not show with a questionmark, and it will appear anywhere. Have faith, it is there. Grab these drivers, http://rapidshare.com/files/190141488/P186113.zip. They are Broadcomm Widcomm drivers. Just unzip and install, a bunch of bluetooth things will start to install.

Note: At the end I got a Unknown device looking for drivers, which disappeared after a while. I suspect its the HDMI or some enhanced keyboard driver, but I cant get it to come back. The computers seems fine though after a whole day of testing.

Also note that you will not have 4gigs of ram anymore, since XP supports only 3gb. In my case, the computer is showing 2.75gb, and I assume the GPU is stealing some.

I hope this helps, and if you have something to add, feel free.

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