Hi, we've all lost the outhaul at some stage or other, I'm sure.
1) to get past "the rope ties inside for the mainsheet blocks", try:
a) pull all kinks out of the line, as much as possible;
b) turn the boom so that the blocks are on the top;
c) angle the boom down towards vertical, with lots of jiggling, slowly does it, you don't want the line bunching up
2) Once you get the line to the other end, use a thin piece of wire (doesn't need to be as heavy as a bicycle spoke), to hook the line out the other end (wire is a handy thing to carry in your kit - ditto a heavy nail and some whipping twine / messenger line - I've been known to use a heavy sewing needle for a messenger also).
Hope this helps.
Cheers,
Ron