Thanks again, I used the guide here to make a usb a bootable hdd Make a Bootable USB Thumb drive in Microsoft Vista

Pretty simple only had to make an autoexec.bat file with the following
@echo off

on it and use the bootable flash version .exe of memtest.
To get it to work had to change the boot priority of hdd in the bios to boot the my stick before my raid array. Works great.