change message type from error to warning or no error

Hi Gurus,

i want to change message type "error(red)" to "warning (yellow)".

Instead of error message in transaction or master data for anything (incomplete field or pdp or org data detm.) i want it to be just warning(yellow) or no error(red) at all.

and can such transactions or master data with warning message be processed further(replicated)  to ECC6.0.

how can i do this at functional level.

please help me with this..

Thanks,

G