Alright, got the latest version of ASIM cdfs, but don't see support in the installer for Subway.
What next?
While I don't use ASIMCDFS myself i've just dug out an old version I have (Ver 3) and after you've put ASIMCDFS in your L: drawer you'll need to create or edit the CD0 DOSdriver to suit your set up...

There should have been a CD0 DOSdriver with ASIMCFS so you should be able to edit that one quite easily...

/* ASIMCDFS MountList For CD0 using Subway */
Device = usbscsi.device
Unit = 0
Buffers = 192
BufMemType = 5
Mask = 0xffffffe
Flags = 0
FileSystem = L:ASIMCDFS
DosType = 0x662dabac
GlobVec = -1
Mount = 1
Reserved = 0
LowCyl = 0
HighCyl = 999
Surfaces = 1
BlocksPerTrack = 32
Priority = 10
StackSize = 5000
#
This is an example of a DosDriver for CD0 using the Subway & ASIMCFS Ver 3.6
Not sure which version of ASIMCDFS you have but it should be similar to the this version unless it has been updated to allow you to use the tooltypes of the CD0.info icon file.
In which case you'd need to put the following tooltypes into the CD0.info file...
DEVICE = usbscsi.device
UNIT = 0
The above are just as an example if your going to call the device CD0 and using ver 3.6 of ASIMCDFS and using it as unit 0...
