So many questions... so little time

Sorry if i'm more offline than usual and many questions stay unanswered. I'll try my best, but my time is very limited at the moment. Maybe some of the other users can help.
There is a bit experimenting and learning required in order to create a decent script. Best way to learn the possibilities is to play the tutorial and study the _tutorial.xml. "Copy & Paste" from _tutorial.xml helps to start a own script. The importer works fine for basic teases, but requires some knowledge about working scripts to import more advanced teases with conditional manipulation. There a some samples in _tutorial.xml for use of set/unset.
I too am interested in using compound conditions (i.e. A+B and A|B). However, I am unable to fathom the exact syntax required.
Compound conditions (i.e. A+B and A|B). are
not included in the latest Release of TeaseMe (v0.1.1)! Only the "work in progress" source code on github (see url in first post) supports this feature. I'm not sure what else Takenaga changed in the source code files. He sends me a message when the source code files are prepared to create a new release. We wanted to have more than compund conditions to create a new release version.
Also, allow me clarify If I understand it right with the flags on buttons and delays.
Set/unset - when used on a button, if you click it it will set/unset a target page or trigger. On delay it will set/unset a trigger when delay is over, right?
if-set/if-not-set - when used on a button or delay, this element will be active only if the flags are true.
One minor correction: If you click a button with set/unset you set/unset a "trigger" (="flag") with the specified name (e.g. set="found_treasure" sets a "trigger" named "found_treasure"). A page whose "id" is identical to a "trigger" which was "set" can't be shown and will be skipped at random targets. So you can use triggers in buttons to "set pages". But it has nothing to do with the target page of the button. The option "AutoSetPageWhenSeen" automatically creates and sets a flag for every page after the page is shown.
can I use multiple triggers if-set if-not set? For example I want to show page3 only if pages 1 and 2 were already shown?
Not at the moment. But its a feature i also wanted for a new release

Same goes for multiple delays on one page - each one with a different if-set/if-not-set condition.