Orchid help!

I've never owned an orchid, much less try to nurse one that is almost dead. Today my friend brought me her Phalaenopsis. The spike was about 16" long (blooms were gone), 2 outer leaves healthy, 2 bottom leaves yellow and falling off and the medium smelled of decay. I ran to Home Depot (it was after 6:00 p.m.) and purchased a clay pot with openings at bottom (same size as plastic one it was in) and Better Gro Phalaenopsis mix (western raw fir bark, hardwood charcoal, chunky peat moss and coarse perlite). I also purchased Better Gro Orchid Bloom Booster 11-35-15. I first cut the spike down at the base of the plant. I removed all of the old media and rinsed with bottled water after removing most of the "snake skin" or membranes that shed off most off the roots. I cut back whatever was black or brown, cutting "above it". I soaked the new potting mix before repotting what I was left with. There are still a few good roots and 2 very healthy leaves but I had no clue what to do with the wiry roots that have shed their skin. Do I need to cut these wires also? Most of it is now "clean", watered, drained and fertilized but I don't know if I treated those roots properly since they might be dead. I appreciate any feedback since this is a learning experience for me and I realize this may be a lost cause. Btw the wires are white if this means anything.

Just leave it alone in good humidity and bright shade. Spritz it to keep the humidity up and resist temptation to do much else. Orchids are by and large tree weeds, and more harm is done by helping than by anything else.

And never ever fertilize a plant that isn't showing active growth, especially after the stress of being pruned and repotted. If you fertilized full strength I would run water through it or soak it in a bucket of water to flush it out.

Thank you! My main concern was if I should have cut the wiry roots that were underneath the rotted membranes (velamen, I looked it up :) Well, these are supposed to carry nourishment to the plant and most are gone. I think they are supposed to be cut also but I haven't been able to find any more info and this is really beyond me.

I have her on a sheltered porch right now in a spot with morning dappled light. I hope I did away with most of her stress for now, but if there's anything else please let me know. I appreciate the advice.

I forgot to mention that I sprinkled the roots with some cinnamon after cutting. Physan comes highly recommended for this sort of "surgery", and if I have any success with this project I will invest in better supplies.
She has 3 really good leaves (I mentioned 2 before in error). I will provide photos later on today, but I wish I had taken photos of the roots before repotting. I will have to wait before I can do that now.

I took these today.

...and closer to the root.