Have you tried Hermes v4 installer for IOS202 it will install IOS38 merged with IOS60. So, you will have IOS38 and IOS60 support. I was under the assumption that IOS38 was a given in Hermes v5 and the installer just adds the other IOS's.
FTP Server doesn't work for Ethernet-Adapters (maybe for some Wifis too) if you install IOS202 v5 based on IOS57. Also there is no Channel list in the StartMenu with that.
It is recommended to use the very old Hermes IOS202v2 base 36 merged 60 for the FTP to work.
You'll have all features of WiiXplorer with it. If this doesn't work try another variant of it like v4 base 38 merged 60. If you don't want the old version installed on your Wii (which gives no disadvantages btw) live with FTP Server not working!!