the folder jsgmemods should have a subfolder with widescreen in its name (I'm using DBW 1.71 superpack by sas1946.com which is built over UP3) copy that to your #UP# subfolder
the correct shortcut should bring up an IL-2 selector window first where you can adjust memory settings and mods files cache, etc
similar to this image:
http://www.pcpilot.hu/images/stories.../01//step1.jpg