try downloading the equivalent drivers from below
The QT5500 is basically a rebadged Quanta TW3M (you should see TW3M printed on the underside of the laptop) so you can also download the Intel 945GM video drivers from the intel website. The link also has drivers for wireless and your audio - you are looking for conexant high definition audio drivers and Intel Pro 3945ABG wireless LAN drivers
http://downloadcenter.intel.com/Product_Filter.aspx?ProductID=2476&lang=eng
If you are having problems finding drivers for the QCOM wireless card then try the Ralink USB(RT257x/RT2671) drivers, these are available on the Ralink website. The QCOM card uses a Ralink chipset so the drivers should work ok.
http://www.ralinktech.com/ralink/Home/Support/Windows.html
If you need to find a driver for the conexant high definition audio here is a link that may work it is for the same chipset for a compaq
http://support.thetechguys.com/layout.aspx?ID={1f8a5d81-a3ea-4a24-aa01-6f6c9cb0642d}&CatID={a790afca-b65b-4935-bf80-a535887a8c5c}
You should be able to get the drivers from the tech guys website or they may be able to send/sell you a new driver disk. You can call them on 0844 800 3040 (charged at £1.50/min) or you can email them from here
http://support.thetechguys.com/Layout.aspx?ID=63aec0d4-34ec-446b-a321-118d62be91bc&CatID=d84bf96d-c05c-48cf-b4af-dc9bcb284743