(Please note - this is designed for a non-techie and may not be totally acceptable in all the things to a techie, but is good enuff for the general user that has no desire to learn, nor to understand all the tech stuff.)
First - OS X is not for everyone, neither is XP, Vista nor the myriad "versions" of Linux. (ex. versions = distributions to the techie, but not to the average joe)
There is a difference in the "motherboard" used by Windows and the "system board" used by Macs. Windows uses boards with a BIOS and OS X uses boards with EFI. I know you're not a tech, so just suffice it to say, this is why you cannot just put in your Vista disk, format the drive (thus erasing OS X from your machine) and install Vista.
You can however, as goobi and Kash have pointed out, download and run Bootcamp which will allow you to install Vista. (Would personally recommend XP Pro instead, but Kash has been running Vista on his Mac as long, if not longer than anyone else here in this forum). You will be keeping OS X on the machine, because Bootcamp is required for the translation of the motherboard/systemboard information into something that windows can understand.
When you run bootcamp, part of it will be setting up a partition to install Windows on. You will have to make a decision as to what format you want to use for this partition and the size of the partition. The options are Fat32 and NTFS.
If you choose to go with Fat32, when you are booted up in OS X, you will be able to read and write to this partition without adding any other software. The largest size partition you will be able to set using Fat32 is 32GB. With Fat32 you also will not be able to have any files larger than 4GB.
If you choose to go with NTFS, when you are booted up in OS X, you will be able to read from the NTFS partition, but will not be able to write to it without additional software. There is no limit to the partition size you can create using NTFS, nor is there the file size limit of 4GB.
In order to write to NTFS from within OS X, you will need NTFS for Mac, currently still in beta testing (and functioning admirably on my system) available in
this thread and look for post 36 for the 2nd beta.
In order to read and write to your Mac partition from within Windows, you will need
this, no matter which format you choose.
While I feel your pain in not being able to get all your peripherals working in OS X, there is one thing all the non-techies need to get through their heads.
1) There are only 3 basic end user Operating Systems (OS) - Windows, OS X, and Linux.
2) There are literally thousands (if not tens of thousands) of pieces of hardware and software applications that can be attached to or installed on a computer.
All of you that think the distributors of the
three Operating Systems are suppose to go running to each of the
thousands of hardware and software vendors to see what they need to change in their OS so that this vendors hardware or application will work, (sorry) need to wake up and smell the coffee.
There is a market out there of people who use only windows, only OS X and those that are using some flavor of Linux. There are also many that use a combination of, or all three of these OS's. It is up to the hardware manufacturer and the software developer as to which of these markets they want to sell their merchandise to. The information is available to them to make their merchandise compatible with all three OS's. It is the hardware / software vendors choice here. It is not up to the OS developer at this point.
Sorry, but the ones to be mad at are not the OS developers here, it is the hardware and software vendors that have decided to cater and develop for only one of the three OS's. The available choices are:
1) As a user of a single OS - you buy hardware that has been developed with your single OS in mind
2) As a multi-OS user - you buy from companies that produce hardware with support for all the OS's you use
I know this doesn't help in many people's current situation when they first make the move to a new OS and they have invested money in hardware without this consideration in mind, and don't have the funds to go replacing all of that stuff. Most of us (including myself) have been oblivious to this in the past because we only knew windows and all the major hardware manufacturers catered to us as windows users. With Vista, I believe there has been a pretty large shift in this paradigm. While not enough to bring MS down from it's crown, it is enough that hardware vendors are starting to take notice and more and more are providing drivers and inter-OS functionality. This is a good thing.
As a bottom line, I will say that if OS X is not for you and you wish to move back to windows exclusively, imho, Bootcamp should be considered to you as only a temporary fix to do what you would like to do, and am in agreement that when funds are available you should look towards replacing your Mac with a box designed for windows.