Adding supported enctypes to kdc

[Steve Devine]

Our current supported enctypes are:
des3-hmac-sha1:normal,  des-cbc-crc:normal, des-cbc-crc:v4, des-cbc-
crc:afs3

I want to add rc4-hmac
So my question is will this disrupt anything? I have read that the
order matters where I put it in the file.
Do I need to rekey any principals with keepold? I don't intend to
remove any enctypes just add them.

Should I add anything else while I am at it? We are striving towards
Microsoft Compatibility.

Thanks
Steve Devine
MSU