One Design, Many Templates
Lightroom's Template Browser gives you the capability to save your designs for later use. It does not, however, permit you to take settings from one engine and apply them to another. Luckily, it's a very simple hack to get around this. Using only a text-editor, you can share design settings between any combination of CE2 web engines.
For example, you create a design -- color scheme, masthead, typography settings, etc. -- in TTG CE2 Pages. You then want to apply those same setting to your galleries made with TTG CE2 Highslide Gallery. Duping settings is a great way to save time over dialing in your customizations again and again into each web engine.
A few things to keep in mind:
1. Templates only save settings which are changed from their default values. Therefore, one engine's defaults will never overwrite the defaults of another. Awesome.
2. You can only dupe settings which are common to both engines; i.e. the setting in your source engine must also exist in your target engine for that setting to be copied. Therefore, you can easily copy settings from one CE2 engine to another CE2 engine, as they are built on a common framework. However, you cannot copy settings from a CE engine to a CE2 engine; the different frameworks have little or nothing in common.
So, how is this done? The step-by-step procedure is written out on the wiki. Alternatively, you can follow along with my video demonstration, below. I recorded the video back in 2010, so it's a bit old now, but no less relevant.