Well in that case Tammy you only have 1 HDD as a RAID combines both Drives and only shows one Drive available in Explorer.
If it comes that way you'll have a Stripped Array so you get better performance as both drives only hold part of the Data to improve speed.
If you want to use the 2 drives separately you'll need to reinstall the 64 Bit OS without the RAID which may not be the easiest thing to do as the Recovery DVD will have the RAID Drivers and setup slipstreamed on it and want to install it. You may need to remove one of the drives to get the system to load if it will at all.

I'm not sure about the Dell RAID as I seem to remember that it's not actually a RAID 0 Array it is only described that way to make it easier to sell the idea. Dell has this description on their Web Site but I seem to remember that they do it differently.
http://tinyurl.com/48pyxrJust another thought any 32 Bit Windows can not use 4 GIG of RAM so 6 will most defiantly be over kill but work a treat with the 64 Bit version of Vista.
Now for your other questions.
I wonder if XP would be easier to dual boot instead of Vista 32 bit? or the same issues?Sorry same issues but XP works better than Vista and supports more hardware so it might be a better option depending on your hardware include external things like Printers and so on here.
Any chance of there being a software program out there that would do all the leg work for me???? (wishful thinking huh?)Sorry No there isn't and even if there was such a beast I wouldn't trust it as far as I can kick the M$ building as unassembling a RAID 0 Array and removing the RAID Driver from the Windows Kernel isn't something that is possible or desirable. Well with a software solution at least.

On the Plus Side installing the OEM 32 Bit version of Vista will be a breeze after you have reinstalled the 64 Bit version without the RAID. Though you will need to download the 32 Bit Drivers for this hardware as the 64 Bit ones will not actually work on a 32 Bit OS. To do this open Device Manager and make a list of all the hardware and then look for 32 Bit Drivers for it. Start off on the Dell Web Site they should have the 32 Bit Drivers already there so you can download them easily. If they don't have em all try Drivers Guide for the required drivers that Dell doesn't list.
http://tinyurl.com/khyvvJust remember to save them to a different location as when you delete the RAID all of the Data will be lost. But on the up side Dell provides several different Install Disc's there is the Primary OS and the Media Center or something like that which needs to be installed first to set the basic Partitions on the HDD's But you may not want to use this as it is only a recovery option which you can do without.
Then you will have a Driver Disc which contains some system drivers and all of the Utilities and another Driver Disc and then the Office Install Disc.
The OS install Disc is a DVD and all the rest should be CD's so they will not take long to install but none the less you should install one driver at a time and not allow the system to use the complete Driver Install Utility as they do produce problems with incompatible drivers conflicting with each other on the install.
Unless you are a glutton for punishment it may be easier to just fit another HDD to install the 32 Bit Version to.

OH also be prepared to need to download up to a GIG of Dell Drivers and Utilities for the 32 Bit Version of either XP or Vista so if you know the model that you purchased or are otherwise getting you could start download loading the drivers and Utilities now for the 32 Bit. You'll need to run the EXE on the system after you get it and they will install to a folder on the C Drive called dell where they will run from.
Also when you install the 32 Bit OS
Do Not Enable the Auto Update Option on the screen before Windows Opens for the First time as you will have problems with the Sound Driver which needs to be installed before you connect tot he Windows Update Server.
Having second thought yet?
OH and very importantly remember to remove the COA for the plastic Covering on the 32 Bit OEM Disc you can not install this without that 25 Digit Alpha Numeric Key. It should be stuck onto the case for use latter but none the less I always make a record of the Product Key as I find the COA very hard to read when it's on a case. Maybe that's just me and my 21 + year old eyes failing but I have seen numerous cases with OEM Product where the plastic covering is just ripped off and tossed and the COA gets lost. The COA is a Sticker on the outside of the OEM Product which you peal off supposedly before opening the product.
Col