extfs dir

[Holger Herrlich]

Where can I find the extfs directory. Got hp48 extfs running on debian 
Lenny but missed that dir at Zenwalk6.4 running mc:

$ mc -V
GNU Midnight Commander 4.7.2
Virtual File Systems: tarfs, extfs, cpiofs, ftpfs, fish, smbfs
With builtin Editor
Using system-installed S-Lang library with terminfo database
With subshell support as default
With support for background operations
With mouse support on xterm and Linux console
With support for X11 events
With internationalization support
With multiple codepages support
Data types: char: 8; int: 32; long: 32; void *: 32; size_t: 32; off_t: 64;


Where can I put the hp48 script into?

Kind regards,
Holger