Novell's own SUSE install guide
looks nicely written, and covers all the steps you'll need to install SUSE without getting overly technical. If there are specific issues or questions you have, feel free to ask back for advice/clarification.
And the hidden partition shouldn't be an issue - I'm not sure on what/how a partition gets 'hidden', but I am sure it's a Windows-only thing (perhaps a special filesystem?). The partition is there on your hard disk, and as a result Linux's fdisk utility (or similar) will
be able to see and edit it. My guess is that in the worst-case scenario it'd come up as "unknown filesystem type" or something like that.