Venture capital firms (some of them) have a program for 1 or 2 person
entreprenurial teams to incubate the idea and test it out (few months,
relatively small funding).

Trying to understand the parameters of this arrangement, it would be
great if there were some case studies, personal stories on the
internet from entrepreneurs who have participated (especially if it
did not work out) and/or any templates of the agreements made between
Vc firms and entrepreneur.

I am particularly interested in technology-based incubators, primarily
in Silicon valley, CA,USA, although related stories about other VC
firms may be also useful.

In my research, I have spoken to a few VC firms in addition to
web-based searches and did not get anything meaningful other than feel
good PR stories.

I expect to provide a tip to a good answer and open to changing the
price instead, if that is preferred.