Thunderbird Portable 3.1.6 as a default mail client in Windows 7
I want my Thunderbird Portable 3.1.6 to be a default mail client in Windows 7. The main problem why I can not do this is that there is no Thunderbird Portable in default programs list in Windows 7. There is Thunderbird in the list but it is not portable one. The same story was when I wanted to make my Firefox Portable browser as a default browser. This helped me https://sites.google.com/site/firefoxuniversal/brauzer-po-umolcaniu (written in russian, but there are pictures that can help you to understand).
If someone finds the solution, please write it here. Thank you.