There have been a few instances of aftermarket filters collapsing, one of our mrmbers here Mrridden82R65LS, if I'm mistaken, had one do this recently.
Can't remember if it was a Fram, or K&N oil filter.
Best bet is to stay with OEM parts in this instance.
When I installed an oil cooler on my '81 R65, I had to change the center pipe in the oil filter housing to a longer one, is this also the case with using a non-oilcooler hinged oil filter?
Once you get the filter cover off and the filter out, you will see it really isn't all that difficult, it's just a bit out of the ordinary for a motorcycle oil filter installation.
Like Bill said, oil filter in first, then install the thin sheet metal ring, there's a small lip inside, that it rests against, then install the cover with the o-ring installed.
One thing you might want to check, is with the filter out, take a look into the oil filter cavity, and there is a pipe in the middle of it, check to see if someone may have left an o-ring in there, the original filters didn't have any seals on them, you had to put an o-ring on the pipe, then install the filter.
I've heard of people finding this one still installed on their bikes on the first oil change after having purchased the bike from another owner.