Blenheim take off

[Seeker]

How does one edit the stock training missions? I don't seem to be able to find them via the FMB's file system browser.

Reason being is that yes, unsurprisingly I've been using the stock mission to try to take off in the Blenheim (isn't that what it's for??). So far this has been impossible for me.

Quite a few have postulated that that mission has a strong crosswind component (of course! on the first buff training mission they throw in a crosswind just to encourage the noobs! What were they thinking off <bangs head on desk, hating 1C's game design team even more>), so I thought I'd open the mission in 1C's delightful content editor to remove the crosswind.

But I can't even find the mission

(and no, I still can't take off in the dammed thing).