I've done it before. I wouldn't say it's easy, but it's satisfying for the nit-picky sort of hobbyist. Depending upon the quality of the result you're looking for, you'll need to purchase a variety of specialised tools and supplies. A good quality art supply store should be able to supply you with things like backing board, bone folder, etc. Beware of purchasing tiny bits of linen at exhorbitant prices -- go to a fabric store for such things in much larger quantities at more reasonable prices.
I used to have a couple of great links bookmarked, but lost them last year. No, wait! I just found it again. I really quite liked
this one best.
I've only done it twice, and while it was very time consuming, I found the experience highly satisfying.
!i!