Let me just say that if you rarely use Ubuntu, you might as well uninstall it right now, since, as you said, you've no need for it since you do everything in Windows, but keep in mind, you can do almost everything in Ubuntu that you can in Windows. About the GRUB Menu Order, I remember doing it Ubuntu 10.10, but the menu is different in Ubuntu 11.04, so I'm not sure how to answer it, nor do I know how to phrase it into a Google Search to obtain accurate search results. So, let me get straight to safely uninstalling.
1. Boot into Windows, which is an obvious thing.
2. Download EasyBCD
http://neosmart.net/dl.php?id=1
3. Once you launch EasyBCD, one of the menus has the option to install Windows 7/Vista MBR, search for it, there aren't many menus to look through, but I think it's in the section called "Bootloader", anyway, install Windows 7/Vista Bootloader and to test it out, reboot. If you boot straight into Windows, if not, try again.
4. When you get it to work, open start menu, right click "My Computer" and go to manage. I think the option is the second to last option, it should show your partitions. Delete the partitions without a name, since Windows can not read it, they're nameless. Now, delete the "Free Space" so it becomes Unallocated. Then right click your C: partition and select "Expand" and give it all of the unallocated space. Check My Computer to see if it's back. If so, success, you're back with Windows 7, congratulations and thank you for trying out Linux. If not, then reboot and see if it's reallocated.
Edit: Sorry for the late reply, went to bed early last night. Well, regarding using BASH, thing is... You CAN get Cygwin for Windows which is a terminal shell with BASH, KSH, SH, and most of the other UNIX Shells available. Still, not command to download things from the repository *I.E sudo apt-get install "Package_Name"* but you can download more from the website
http://www.cygwin.com/
Have fun with it, because I know I did. You can get almost everything in the terminal that you can in a Linux environment, including text editors *Nano, Emacs, or Vim* and surely anything else.
I'm starting up my Windows XP VirtualBox to try and seehow to readd GRUB, I recall there being an option to add multiple bootloaders... I can't use it in my VBox for some reason, said it can't find my boot configuration files *Possibly because it's pirated edition* so oh well. If you look in Bootloader, it should give you an option to install GRUB to the MBR, not GRUB2, but GRUB Legacy. If it's not there *And they removed it in the recent update from 2.0.x to 2.1.x, then try this link
http://sourceforge.net/projects/grub4dos/
Never tried it myself, but I found it linked by someone in a forum, but if you want, I can try it out in my Virtual Box before you try it out.
OR you could try this guide out to reinstall GRUB2 to the MBR
https://help.ubuntu.com/community/RecoveringUbuntuAfterInstallingWindows