MS 07 is great, but you have to give it some time to learn the new "Ribbon" interface. Once you get it it's great - the old office will look downright ancient. Plus, there's a new document format of *.docx instead of the old *.doc. It's a smaller file size among other advantages.

Just explore the ribbon. As far as spell check, that's probably under "Review," or just right click anywhere in the document and you should get something for spelling/grammar check. Normally I just use the inline spelling check, where it gives you a red squiggly under a word it thinks is misspelled.