I would be going to the Ubuntu forums and posting your questions there, I am no expert on linux so would not want to try and guide you on the correct way, it all depends on how you initially set-up Ubuntu etc. Sorry that is not helpful but I know the Ubuntu guys are really helpful.

I read your article, and have some of the same reasons to return to Windows myself.However, returning to windows is my problem.
I DID have an option to start in either or at start-up. after upgrading(?) Ubuntu, the choice was eliminated- which is a big problem as I work in Adobe for various graphic reasons, and don’t want to spend hours figuring out alternative programs for LINUX- So question is-
How do I SAFELY return to my Windows XP boot? I understand that an incorrect command can put your computer at risk of not booting at all- and I simply cannot afford that option!! I need to use my computer for work, this week, and this IS a major problem!!!
Can you help?? It would be much appreciated.

Cheers, Ben- stuck in Linux.