From your e-mail, I understand that you have installed Windows XP in your HP Pavilion dv2622ca Notebook and looking for the Windows XP drivers that are compatible with your model notebook. Let me assist you in this regard.
I would like to share that if you wish to downgrade the Operating System from Vista to XP, then you have to use the Retail version of Windows XP Operating System CD as there are no recovery discs of Windows XP for your notebook.
However, I would also like to inform that if you install a retail version of Windows XP, then you may not get the preinstalled applications like Quick Play, CD/DVD burning software etc.
Also, as the notebook is specially designed and bundled for Windows Vista Operating System, you may find it difficult to get all the drivers for the devices installed in the notebook which supports Windows XP Operating System.
However, you may try the below listed drivers that may work with your model notebook:
== Conexant High-Definition Audio Driver
First install the UAA drivers: Microsoft Universal Audio Architecture (UAA) Bus Driver
Now, install the sound driver:
== NVIDIA nForce Chipset Driver
== NVIDIA GeForce Go 7150M driver:
NOTE: The URL above will take you to a non HP Web site. HP does
not control and is not responsible for information outside
of the HP Web site.
Once you open the above link Select Option 2: Automatically find drivers for the graphics card installed in your notebook.
== ALPS Touchpad Pointing Device Driver
== Ricoh 5-in-1 Card Reader Host Controller and Driver
== Conexant HDAUDIO Soft Data Fax Modem with SmartCP Driver
== Wireless Driver: Broadcom Wireless LAN Driver
== HP Integrated Module with Bluetooth Wireless Technology
== HP Wireless Assistant
Note: For all the FTP URLs, the prcedure for installing drivers:
1. Download the Softpaq .EXE file to a directory on your hard drive.
2. Execute the downloaded file and follow the on-screen instructions.
3. Restart the notebook when the installation is complete.
If you need further assistance, please reply to this message and I will be happy to assist you further.