I live in Puerto Vallarta, Mexico, for six winter months. I would love to have a Kindle. Can I download additional books in Mexico or must I download all I think I’ll want to read before I go?

Yes, you can, but it’s a bit of a convoluted process. Amazon says that, if you are a U.S. customer temporarily outside the U.S., where the Kindle’s wireless downloading capability won’t work, you can “sideload” books over the Kindle’s USB cable — normally used for transferring audiobooks or photos — from your PC or Mac.

According to Amazon, here’s how you do this. First, order a Kindle book on the Amazon Web site from your computer and tell it to send it wirelessly to your Kindle. This will fail. But you can then go to the “Manage Your Kindle” page on the Amazon site, which lists all the Kindle books you’ve bought under the heading “Your Orders.” Select the one you want, and click on the drop-down list at the far right labeled “Download/Send to…”. Select “computer” as your destination, and the book will be downloaded to your PC or Mac as a file with the suffix “azw.” From there, you can manually drag this file into your Kindle using the USB cable.

My husband wants to buy a laptop, but I said not to get one with Vista and to wait for Windows 7. Am I right?

I agree that, if he can do so, he should wait for Windows 7. While it isn’t officially released, my experience with its pre-release version has convinced me that Windows 7 is much faster, less annoying, and more compatible with third-party hardware than Vista is. You can read my first impressions of Windows 7 at: http://bit.ly/r9xEP.

• You can find Mossberg’s Mailbox, and my other columns, online free of charge at the new All Things Digital Web site, http://walt.allthingsd.com.

I want to purchase an e-reader. Currently I use my Palm Tungsten, but the screen is rather small for reading books. I purchased the Amazon Kindle for my niece but I do not like the design of it. Are there any other e-readers on the market that have a full keyboard and can connect to the Internet?

A: There may be some obscure models that do, but the main competitor to the Kindle, Sony’s Reader, lacks a direct connection to the Internet. You have to purchase titles on a computer and then move them to the device. The Reader does have a keyboard, but it’s virtual, not physical.

I’m considering the new 13″ aluminum-body MacBook. I’m a nontech guy doing routine computing tasks. I own an iMac and I’m ready to add a laptop. The only downside to the new MacBook seems to be the absence of a FireWire port. Is that a deal killer?

I don’t believe so. At one time, FireWire (also called 1394 or iLink on some computers and peripheral devices) was much faster than USB, but now the two are about the same speed. At one time, plugging most camcorders, or many external hard disks, required FireWire. Now both types of devices typically use USB or offer both types of ports.

If you are a professional photographer, videographer or musician with a heavy investment in USB peripheral devices, then the lack of a FireWire port may make the new MacBook a non-starter. But for an average user, unless you have invested in FireWire-only peripherals, I don’t think its absence would matter at all. Besides, you still have your iMac, which includes FireWire.

• You can find Mossberg’s Mailbox, and my other columns, online free of charge at the new All Things Digital Web site, http://walt.allthingsd.com.