Apply for an account
RTFM!
The questions you possibly have might be answered by our manual:
http://www.fstop.cz/fs3man.html
Option 1: Create a new login application
If you wish to create a new login application, fill in the following form and click "continue." The name submitted should be formatted as "Joe Sixpack," that is two words (first name first, surname second) separated by a space. Do not omit accents. Requested login must be at least two characters long, and the only characters allowed in it are '.', '-', '_', 'a'-'z' (no capitals or accents) and '0'-'9'. Enter a specific piece of information into the 'I know of fs from' field, e. g. a name of a person/site or a URI; vague information such as "the net" or "a colleague" is completely useless to us. WARNING: If, at this point, you fail to submit your real name or a valid, existing e-mail address, or it is found out that you have submitted more than one application within six months or that you are attempting to obtain a duplicate login, your application will be deleted/resolved prematurely and your IP address will be banned, both without further notice.
Option 2: Carry on with an existing login application
If you have recently created a login application, fill in the following form and click "continue."