The feature you are describing - adding license keys without having the software installed on computers - is already possible through Lansweeper. Please do the following to add license keys for software that's not installed yet:
- Click the Licenses tab of the web console.
- Hit the Add New License button to create a license item. You can create an item for a software that hasn't been scanned yet by choosing a scanned software package, submitting it and then changing the software name afterwards.
- Click the Orders tab on the right and hit the Add Order button.
- Fill in the required information, including the License Key field at the very bottom.
If you submit your license keys in the Licenses tab, you could even build a report under Reports\Create New Report that indicates whether or not these license keys are actually found on your computers. You'd need the tblSublicensesOrders and tblSerialnumber tables for this.