Hi
Simply insert a blank, black frame to the start of your film and then add a crossfade effect.
Steps to follow are:-
Depending on the choice you have set up under "Options"/"Other" you can set up to have the inserted clip (any clip in fact) placed at the start of the timeline, the end of the timeline, the cursor position or prompt you as to where you would like it to be placed. It might be best to have this set routinely to "Ask me"
If you also click the little down arrow to the right of the "Insert Blank" button, you can choose the colour of the inserted blank clip.It does not have to be just black or white.
Now,if you already have your film on the timeline, left click the tab on the toolbar labelled "Insert Blank"
You will be prompted where. Select "Beginning of the timeline"
Now left click "OK"
A blank, black clip will be inserted at the start of your film. If you haven't altered the default length of this under the "Options" tab it will have a duration of 5 seconds.
If not already in "Storyboard mode" right click the down arrow in the window marked "Sequence style" to select it.
Between your blank clip and your film clip (now shown as two images) you will see a blue square with lines across it. This is the transition marker.Left click this to open up the transition pane.
Left click the "Crossfade" transition.
Enter the duration you require for this effect and then "Apply"
The transition indicator will change to show the type of effect applied along with the duration you have selected.
Once the program has completed the installation of the selected effect as shown by the yellow progress bar above the transition marker, you can preview your film in the right hand window pane.
You should see you film fade in from the black, inserted clip.
You can alter the duration of the effect and the duration of the blank clip to suit.
Hope this helps
Nat