You can download driver for Memorex USB SD/MMC Card Reader here, but DriversKit`s Team strongly recommend you to use UpdateMyDrivers for finding the latest version of this driver. You can download UpdateMyDrivers here.
Also you can:
Search Memorex USB SD/MMC Card Reader driver at Google
Search Memorex USB SD/MMC Card Reader driver at Yahoo
Search Memorex USB SD/MMC Card Reader driver at MSN
Search Memorex USB SD/MMC Card Reader driver at Teoma
Search Memorex USB SD/MMC Card Reader driver at AltaVista