Making Fedext's flexforms aka fluidcontent with TYPO3 4.5 LTS
- 
    Install the latest TYPO3 4.5. LTS 
- 
    Install extensions : - flux
- vhs
- fluidcontent
- fluidcontent_bootstrap
 
Better to install from the github, rather TER.
Flux must have this patch to work with TYPO3 4.5 LTS : https://github.com/FluidTYPO3/flux/commit/c3d3d6f4f3cad07cc47efa9599fd28a6fa022614 At the moment, it’s still not merged.
- 
    Clear the cache. 
- 
    Include static TypoScript of “fluidcontent_bootstrap” into Your TS setup. 
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    Add a Fluid content element on a test page. Choose the type of Bootstrap Elements. 
- 
    make modifications of the template to test. 
- 
    With TYPO3 4.5 LTS You could make backend templates without fluidpages, only with Fluid to maximize the standalone compatibility 
References
- fedext : https://fedext.net/
- https://github.com/FluidTYPO3/documentation/blob/master/QuickstartGuide.md
- http://thomas.deuling.org/de/2011/06/configure-the-fluid-typoscript-and-create-backend-templates/