With AttachingIT you can adjust / personalize different register settings. You can also choose to confirm all attachments at once. For this you have to make an adjustment in the Windows registry.
The registry settings for the AttachingIT software can be found here:
You need to adjust the following key:
Reg Key: ConfirmAllAttachments
Description: When this key is set to 1, the user has the option to confirm all attachments with one button.