ReInstall .NetFrameWork on MOSS 2007

Dear Friends

I have Moss 2007 set up in Windows server 2003 R2 sever with .net 3.5 installed in it.

Due to some Build Issues in Some Visual Studio Solution ,we  have to reinstall .Net 3.5 framework.

But my concern  is the effect of reinstallation of .netframework 3.5 on Moss 2007.

1) Will my Moss 2007 set up work as usual or not ?

2) if any setup issues occur in between how should i roll back to Previous set up ?

require your inputs and advice.

Thanks and regards

R Prashanth Kumar