Amikit uses Winuae under the hood, so you can change the default config to anything you like.

My default config is a A1200, 68020 CPU, AGA, 3.1 KS, 2 MB Chip, 128 MB Z3 Fast, Dir HDD.

@Hans

Most Epson inkjets use a printing language called ESC/P
(you can find the commands for ESC/P here, although the docs have not been updated since 1997):

http://www.epson.co.uk/support/manuals/manuals_pdf.htm

I even have a Print Magic Code tool on my web site with links to existing drivers and the source code:

http://www.pcguru.plus.com/download.html

I would consider updating the driver (although I do not have access to an OS 4 machine) for AmigaOS 3.x and make the source available. I depends on how many people require it...