Back again!!
I fixed the "N: Ignoring file '20auto-upgrades.ucf-dist' in directory '/etc/apt/apt.conf.d/' as it has an invalid filename extension" error, there shouldn't have been a file extension, seems others have had the same issue.
Although mono is now installed both links still do nothing.
From step 2 on I do not know what you mean by "prefix", in step 2"
Make a new Wine Prefix and have it install Mono in that prefix when it asks you.
I already have mono installed, does this install it again?
Some of the problem is probably due to the fact it was install by Crossover, I will investigate that side.