Hello
I have over 28 years extensive experience with Filemaker Pro and have developed, deployed and maintained many instances from very large and complex down through to small more simple deployments.
If you would like to send through some additional information on your project, including details of the DOS software you are using and which version of Filemaker Pro you are/will be using, I can get back to you with a proposal and some milestones for completing the project for you.
Thank you
Darren