You must be already know that Marketplace is going to close soon.
Not every application you can find in cab, also in language of your system.
I made simple solution for you to store cabs and widgets from programs,that you can download from Marketplace. Use patch cab and run marketplace.
How to use:
0. Backup original WMMarketplaceFullClient.exe from windows\
1. Install patch (for all languages of WM).
2. Run marketplace and download application you like.
3. Once Marketplace will quit by itself during application installation go to Application Data\Volatile\
cab or widget that will be found there is your downloaded program rename,copy it to safe place!
4. Run marketplace again for next..
Deinstall cab, copy backup of WMMarketplaceFullClient.exe back to windows\