In Mandriva you need to install a package from PLF repository
called "ipw2200-firmware" or similar. After installing it with URPMI you can configure your wireless network and link up.
If you don't have any other way of putting Mandriva on-line to install that package, download the noarch package
with Windows or whatever and install it with RPM. Lots of on-line documentation on how to use URPMI and RPM.