Check For MSDE Installation
Would just like to share this with everyone. It is based on work done by KiCHiK, available from:
http://nsis.sourceforge.net/wiki/REG_MULTI_SZ_Reader

I have left the other registry keys in for expandibility(?)/scalability/genericness.

If you can see anywhere where it needs fine tuning, please do not hesitate to post it.

Thank you KiCHiK!