[gambatte]

Sorry but WM is not the typical OS that can be updated like a PC, for example. WM is provided to the phone carriers, Sprint, VZW, et.al., who customize it to work on their networks. So the ROM updates are offered by your phone carrier. The 6700 is a rather old phone and not supported anymore in terms of updates by the carriers. But it is a very capable PPC and the kitchen makers (e.g. BuildOS) have breathed new life by allowing us to put WM6/6.1 on the 6700. So, since the 6/6.1 ROMs are not sanctioned by the phone companies, when you get your phone, you should activate it with the WM5 standard ROM for your carrier. Once you update to 6/6.1, you lose customer support at the carrier. But don't worry 'cuz most ppl on the site know a whole lot more about the 6700 than any rep. In short, a ROM is very device/carrier oriented, and you probably noticed that when you cooked your ROM in the kitchen (note the jargon we use, haha).

The 6.1 upgrade you saw on the Microsoft site was for Windows Mobile Office 6.1, not the OS. I know, kinda confusing. But you will get the hang of it.

BTW, did you get a PPC6700 (Sprint) or a XV6700 (VZW)?