Moving 2tb mirror ed (raid0 htfs) from Windows XP SP3 32-bit to Windows 7 Pro 64-bit

I am planning on making my new computer the ‘computer of record’ so to speak.  I will be moving the 2 hard drives that make up most of my backed-up content to the new machine, and hooking up the mirror ed. also,  hopefully preventing the need to start over with the back-up process.  Obviously, I will need to keep the drive letters consistent.  I haven’t tried the Mirror Ed. on Win 7 yet.  Do I need to download a new version of WD Anywhere Backup that is compatible (this is Win 7 64-bit).  Do I need to download any drivers for the Mirror Ed. to work with Win 7 64-bit? Also, will there be any issues with the file structure (or folder structure) the Win 7 uses?

What is the best plan of attack?

i just hooked it up, nothing else. it worked