I would say, yes, uninstall the old one first. Using CD's is not quite like renewing a subscription online where, theoretically, it should simpoly continue "as is".
Use the Add/Remove option in Control Panel
Then use the MCPR cleanup, reboot and then do the installation.
I read somewhere on mcafee google page that if you bought the comp with mcaf trail on comp that using the tool can remove a program part that isn't on new disc..
now that didn't make sense to me but just wanted to make sure that it won't cock up the install...too old for this crap..
thanks brit, again.
Not sure about that but I do know the tool will not remove (for obvious reasons) Anti-Theft which is software unique to certain brands of laptop and relies on a certain motherboard chip to operate and it would ask for an Admin password if removing Parental Controls/Family Protection.
In the case of Anti-Theft Technical Support usually has to be involved.