Then, simply FTP all the files to have a working menu on your site. Those are made automatically. Beyond that, colors can all be changed to blend with any web site. The program has its own graphics engine inside so that what you see in the preview is what you get, down to the pixel on any browser, version 3.0 or newer. Recommnendations for the MacIntosh are to use Apple's MRJ 2.1 or newer.
Standard firewalls are no problem, either.
Among the types of menus available are bars, tabs, lines and balls, buttons, arrows, indicators, and text effects. There are several others, including specialty designs, such as a post and wood signs for realty sites. There is no pre-sizing the applet. That is determined by the choices you make, but to make it smaller, for example, lower the font size or the padding between buttons or around the menu. While submenus are not built into the program, the program allows more than one menu on a page.