First off, you have to use a working keyboard because you will have to type the product key, press next in the Regional and language options, etc.... So try fixing the BIOS problem that prevents it from detecting the keyboard, apply these suggestions one by one or all if necessary:
1. Check and reset the BIOS settings... 2. use the default BIOS settings or 3. failproof defaults, or 4. reset the BIOS with the battery off for 5 mintues. 5. Replace the battery if the settings don't take effect.
If with a working keyboard the missing files are still not read by the installation program, the problem may be caused by the CD Drive... other times the problem is that the installation program doesn't detect the "missing files", but they are installed anyway... so press Enter to try installing them several times, and ignore them after that.. If the final installation has problems due to the "missing files". Try installing them with "SFC /SCANNOW" typed in the Start\Run command or in a Command Prompt window. Or install Windows XP from a USB pendrive which generally installs with fewer or no errors unlike installing from a CD.