Uninstall everything.
There is a manual uninstal instructions in the sticky thread.
Remove all the other folders with HOI2 stuff.
Reinstall from the CD, then just apply the 1.3A full patch.
Regarding your saves, you can put them in a new temp folder then put them in the new save game folder when it gets created with the install program. But you should really start a NEW game with the new patch, old games are not supported in anyway.
There is a manual uninstal instructions in the sticky thread.
Remove all the other folders with HOI2 stuff.
Reinstall from the CD, then just apply the 1.3A full patch.
Regarding your saves, you can put them in a new temp folder then put them in the new save game folder when it gets created with the install program. But you should really start a NEW game with the new patch, old games are not supported in anyway.