How to use different Unit Tiles in CF ?

[Alan Wilson <adwilson@HotPOP.com>]

Hello,
	Now I have Crimson Fields working, I thought I'd give those new roman
units I did the other night a quick try out to see how they looked:)....
but I must be missing something.

I replaced CFUnits.bmp with RomanUnits.bmp 
(e.g. mv CFUnits.bmp CFUnits.old;mv RomanUnits.bmp CFUnits.bmp) and then
re-compiled, but when I do a make now I get the following errors (am I
missing something obvious ?)

g++  -g -O2 -I/usr/local/include/SDL -D_REENTRANT   -o mkunitset
mkunitset.o mkcommon.o default_units.o lang.o fileio.o strutil.o  -lz  -
L/usr/local/lib -Wl,-rpath,/usr/local/lib -lSDL -lpthread
../tools/mkdatafile ../gfx/CFIcons.bmp cf.dat
../tools/mktileset ../gfx/CFTiles.bmp default.tiles
../tools/mkunitset ../gfx/CFUnits.bmp ../gfx/u_infantry.bmp ../gfx/
u_artillery.bmp ../gfx/u_fighter.bmp ../gfx/u_railgun.bmp default.units
Couldn't find palette
make[1]: *** [default.units] Error 255
make[1]: Leaving directory `/usr/local/downloads/crimson-0.4.2/tools'
make: *** [all-recursive] Error 1


Do I need to create a new palette as I've used colours outside of the
ones currently used in CFUnits.bmp ?

Cheers

Alan