Ascii raster -> CTDB (Modsaf)

[Conn Copas]

Anyone using the Modsaf simulation out there? I want to get some terrain data
into it, but it insists upon the slightly obscure CTDB format. My source data
is ascii raster. I am aware of the Multigen package, but am trying to avoid the
expense. So, it would be absolutely wonderful if someone is willing to share
an ascii/DTED/DMA/etc -> CTDB converter. Failing that, I could use the
specs of the CTDB file format. Thanks in advance.