I would urge caution on Installaware. We recently had a shocking experience with their customer support.
We followed one of their sample projects to the letter which failed miserably. Raised a support ticket with customer support and were told it was going to cost us $199 for them to look at fixing their own code.
We then raised the same issue in the user forums and were promptly banned because this constituted cross posting and was not allowed. Even though this is not mentioned in their terms and conditions. In fact, they banned our IP so no one in our company can post to the forums.
A very poor experience and one we wont repeat. We are now looking to replace Installaware as soon as possible.
Purchase Installaware at your own peril.