Hi Seresh,
That should be absolutely OK. Toolbox recognizes whether you have a Premium Pack skin or not, and if not you just don't get the variable categories and help texts, which it manages with exhaustive internal documentation of all the variables in all the PP skins. Everything else is generic, so you can edit templates, baggage files etc without any limitations.
Note that the main difference is that you can do things in Toolbox that you can't do in Help+Manual with skins, specifically adding settings for the HTML Export options for both WebHelp and CHM, which will then override those settings in the project. This allows you to have different settings for those things in each skin, instead of having to change the settings in the project.
I know that Webhelp skins override project settings in regard to font-face used, etc.
Not exactly. Font settings in the skins are basically for the fonts used in the skin interface, not for those in the project content. Project content text formatting is handled by the project CSS stylesheet, which is generated from the styles in your project and inserted in the HTML templates with the <%STYLESHEET%> variable. You can override anything in that stylesheet if you redefine the same styles AFTER the appearance of that reference. But have a look at the generated file first to check the naming of the styles, which are separated into paragraph and text settings.
Does that apply every time, when the style name is the same? (And is it the style's name really?)
The styles in the project stylesheet are split into text and paragraph attributes. The text attributes are applied with <span> tags and the style name for that is changed to f_stylename, while the paragraph attributes are applied in the enclosing <p> tags and the style is renamed to p_stylename. You'll see how it works quickly if you have a look at the generated CSS file in your output and the corresponding HTML code.
Is there an easy way to determine font sizes used, since pt in the GUI will be px in output - and CSS as well as browser conventions make this involved, not to say tricky?
That's not automatic. You set the units to be used in the output yourself in your project, in Configuration > Publishing > WebHelp > HTML Export Options: Font Size Encoding -- or in the HTML settings in the skin if you are using Toolbox. Note that that only affects the generated CSS stylesheet. Any additional CSS files you create in the skin are your responsibility, and you have to use the correct units there yourself.
