@ Stuart
Stuart, your post is a reasonable one, but it is not up to me to say what Sandboxie can or cannot do in glorious technicolour. I am just a mere user who has had 10 years of brilliant, flawless and highly efficient service from the program.
If you wish to go into intimate detail concerning Sandboxie`s capabilities and limitations or have some criticisms to make, I am not the person to satisfy your curiosity. I suggest you put your comments and queries etc. direct to the Sandboxie experts, either by joining their Forum or by direct contact.
The Forum is -
http://forums.sandboxie.com/phpBB3/ and you will find an abundance of enthusiasm to answer your questions in ex[licit detail.