Well technically you don't need 2.04 for either of those tasks - 1.3 can handle both..
The FFS goes in the RDB of the hard drive, so you can have an FFS drive with 1.3 and also you can get crossdos or messydisk for 1.3
But it's a good idea to upgrade - 2.0 forwards is a big leap from 1.3 in usability.
Hope you can find those 2.1 disks so you can get crossdos out of the box..