You need to own OEM License to be able to redistribute Virtual Serial Port ActiveX Control by Eltima without any limitations. OEM License permits you to embed Virtual Serial Port ActiveX Control technology into your own software/hardware products. OEM license is a royalty-free one-time purchase.
Here is a step-by-step instruction how VSP driver and VSP ActiveX Control should be installed on target machines (you can include this as a part of your software installation):