how to make dosemu hdimage.first larger ?

[Felix Natter <f.natter@ndh.net>]

hi,

I'd like to run a dos game which requires 1.5Mb of hard disk space,
but dosemu's default hdimage (hdimage.first) is only 1.2Mb large.
Is there a way to create a hard-disk image of a specified size ?
(does not need to have anything in it, because it will be the secondary
drive, not the boot-drive).

thanks,

-- 
Felix Natter