I googled D-Link DWL-520 Rev.A2 linux and all that showed up was a portion of a mailing list. The title was "Re: /opt/kernel, depmod" and the info inside was not especially helpful to me.
Does Linux-Wlan support the DWL-520 Rev.A2? I looked at that already. It shows that it is a Prism chipset, but doesn't list it as a tested card.
Also, I intended my question to be more general. To make this card work, will it require a kernal recompile, a file download, etc.? As I said in my original post, I haven't ever done this type of thing.