Installation of Blat

We have created a Batch File to run Blat in order to mail results for our POS System. It now runs successful and I am now considering to roll it out to our 300+ clients.
 What is the best way to store all relevant Parameters (Including SMTP Account Information (We will use our company's SMTP account for that purpose and this needs a log-in) in an "Idiot-proof" easy way?
I keep having trouble with blatinstall.bat and such ...
 Am thinking now to create a .reg File, one for 32 Bit and one for 64 Bit Systems.
 Or is there a better and more appropriate way?
 Someone to take me by the hand and guide me through a Blatinstall.bat that has only one group of settings?

This one does not give me the requested results:
 

 C:\OurPOS\Blat\blat.exe -install smtp.provider.com [email protected] 5 586 - [email protected] smtpw

 

 Thanks!