Windows 7 - All else equal, any reason to not get Win7 Pro?

Ok, so I've backed up all my important things on DVDs.

When I purchased the upgrade I opted for the book disc kit for an extra 13 bucks.

Anyways, knowing that I have to do a clean install, I chose to download the .iso file instead of the .exe. I saw this tutorial:

Make bootable iso from student d/l

but i shouldn't need to do that correct? Since I downloaded the .iso, all I should need to do is burn that iso straight onto a DVD and then boot from disc right?

One thing that's kind of bothering me is how small the ISO file is. It's only about 3GB. Is this correct? Or am I missing something?

On a side note, when I burn the ISO, in Nero do I select "Make a boot DVD" or do I select "Make a data DVD" and then assume that because it's an iso, it'll be a boot dvd anyways. Does that make sense?


EDIT:

Oh wait!! Can I do that? Can I boot from disc and then clean install? Since I have an upgrade version? That means it has to be done from inside a current Vista OS right? ****, I'm confused and worried now. Worried because I'm so confused.


EDIT 2:

Just had another revelation. Since I'm going from 32 bit to 64 bit do I really need to do anything special to get a clean install? Won't the installer recognize that I have a 32 bit OS installed and then recognize that it has to do a clean install by itself?

Use ImgBurn to burn as .iso at the slowest speed with media your burner supports. Then boot the disc in windows and choose clean install. It will dump your settings in windows.old. That should do it.

So I boot in while i"m still in Vista then? No worries about it? Because I thought that because I'm currently running Vista 32 bit, the 64 bit wouldn't install correctly.

First, make sure that you burn the .iso as an image file, or your new disc wont boot... Once the disc is burned restart your computer and follow the prompts...

You'll be surprised how driver-complete the Windows 7 installer is.

Select "connect to the internet during install" and you'll have them added to the installer during installation.

Afterwards, more will come in on Windows Updates.

This is not XP or Vista where you had to dig up drivers. MS sponsored the WHQL partnership with every manufacturer to build Windows 7 drivers, so they have them first since they paid the tab.

Exactly. Just to clear this up: Download ImgBurn, then right click on the .ISO file, and select burn with imgburn. like the guy above said, slower speeds are safer. Then, restart, go to bios, change your boot order to 1. CD/DVD 2. Hard Disk, and then restart again, then put in the DVD, and it will tell you the rest. I dont think you should format before doing this, cause the image is a upgrade one right? It will probably just install on vista all by it self. If theres any more confusion, post.

Happy Xmas!

Thanks guys, I got it to install. Much much easier than I thought it would be. I probably stressed more than I should on it. I just heard all these installation stories about it and I panicked. I'm pretty good with 7 right now, there are instances where it feels sluggish but I'm gonna give it some time before doing anything drastic.

If you want to direct the nervous energy where it might find solutions plus learn something, study the Event Viewer Administrative View and google the chronic errors.

Otherwise the initial slowness can be due to indexing and SuperPreFetch learning your use patterns so it can anticipate them.