InsideHW.com has posted an article about Asus EEE PC running on Windows XP. Here's a bit:

For XP installation you need to have extern CD/DVD device, which is plugged in EEE PC using USB interface. First thing you'll spot, after drivers installation (drivers from package are installed with "OneClick" routine, which is praiseworthy) is time needed for OS to boot up. Everything is working very fast. Users familiar with optimization of XP should accomplish even better results in this segment. We have installed Office 2003 with expectations for EEE PC to work smoothly in Excel, Word, Power Point and similar. The biggest problem of Asus Eee PC, besides little hard disc (which can be expanded thanks to price and capabilities of SD cards) is display resolution. 800x400 pixels is more than enough for "help out" but not for normal and easygoing work. EEE has D-Sub connector and in indoor environment you can connect additional monitor, but that won't help you if you find yourself in the outdoors. But there is solution. You need to set graphics drivers to display larger resolution than EEE's graphics chip offers you as default. We have been set virtual resolution until 1024x768 pixels. Here is how it looks in practice. It can be seen only small piece of desktop with chosen resolution. When you come to the edge of monitor with your mouse pointer, it starts to scroll horizontally or vertically and it moves to selected part of virtual display. That actually means that you will have much larger desktop size. The greatest benefit of all has Photoshop with all of its tool pallets. After installing video codec we even played a couple of DivX and DVD titles and everything was working quite perfect.

When we plugged in our 37" test LCD TV 1366x768p we got a functional machine for surfing, listening music, watching movies ... EEE PC become our home multimedia center. But for complete pleasure we should watch some HD film, to completely make use of our large external display. We tried with 720P video material (we knew that a 1080P film won't do properly, because of weak CPU). The whole time we had chops and we just couldn't enjoy the movie... But suddenly we've realized that our EEE PC was working at 630 MHz but not at default 900MHz (for Intel Celeron M353 CPU). So it seems that Asus has been underclocked this CPU (reverse from overclock) to reduce power consumption, bigger battery autonomy and lower heat dissipation. That actually makes sense if the laptop is in move, but if it is connected on electrical power grid than the clock should be set at 900MHz. Soon we come to conclusion that in BIOS doesn't exist option for returning to standard CPU clock. So we resort to trick called "clock generator" for motherboard. We had successfully overclocked CPU at stabile 950MHz and 720P video material just "took off". We got "ultra-portable" multimedia player and Asus EEE usability got complete new use dimension. It is interesting that overclocked Eee in full load mode was warming for only 3°C (5.4°F) more than it was at 630 MHz with FSB at 70MHz.